Help! Can't root (Step3) - XPERIA X10 Android Development

Hi everyone, I have an X10a and managed to get upto step 3 without any drama. Once I try to do step 3 however, it says that the device wasn't found. USB debugging is enabled and everytime I plug the phone in, the windows device manager thing comes up and tells me my phone is an X10i. Then it says there is an error and the new hardware might not function correctly.
I have the latest Pc companion and everything. Any ideas?

Phew never mind.Just needed to let windows do it's thing

Can you elaborate how did you overcome device not found problem in Step 3?
I have the same problem and tried with re installation of PC Companion, SEUPS and doesn't work.
After Step 2 both of my computers can't install proper drivers for the phone even though the SE PC Companion and SEUPS detects device.
For some weird reason Windows detects my phone SO-10B (or X10) as X10i in Device Manager and don't know why. I tried to install manually drivers through Device Manager but it wouldn't let me. I tried Step 3 procedure on 2 Windows 7 computers 32bit and 64bit.
I rebooted, I changed USB ports.
It just doesn't detects it
Help, please. I'm quiet desparate

Install PC Companion then it will work its got some needed drivers

If the device manager pops up and asks you what to do, let it install drivers. Just let it search automatically and as thor said, you need pc companion.
EDIT: What I did exactly was go into control pannel -> Printers and other hardware -> add hardware -> yes I have already connected the hardware. Then let it search for updates. It took a few minutes for me until it managed to find the drivers. I'm on 32bit XP by the way.

Guys I already wrote that I already reinstalled PC Companion and SEUPS.
I do have PC Companion installed and even updated to the newest version.
The device is now detected and installed correctly.
The only problem that Step 3.cmd still can't detected it on both of my computers (win 7 32 and win 7 64).
I even started the whole process from the beginning and I'm again stucked at step no.3
Here is screenshot.
hXXp://img143.imageshack.us/img143/4062/capturehul.jpg
Some other advices?
-USB Debuggining is enabled
-USB Storage is enabled (I tried with disabled)
-Both computers and phone were restarted between tries multiple times.
What should I do?

Mod. edit: There is a sticky for this kind of rooting related issues. Pls use that instead of opening new threads. CLOSED.

Related

[Q] Win7 64 Cannot Connect phone mini Kies Froyo Update

So, quick backstory. I have two PC's at home. A brand new win 7 64 bit laptop, and an older XP desktop. Neither will recognize my vibrant, and never have. At work, I have a win XP desktop, and I can connect the phone to that and use mass USB storage and move stuff around just fine, so I've gotten by in that regard in these 6 long months.
Then comes this #$%%^$#$ Froyo update. Who thought it would be easy?
I have downloaded kies on each machine. (As well as ODIN, but same issues.....computer/phone wont communicate). I cannot get my two home computers to connect to the phone, no matter what settings. BTW, I have rooted my phone with OCLF and subsequently un-rooted before trying any of the following. I have not flashed or updated the phone otherwise with any other software, other than what apps are available in the market.
I've tried
-USB Debugging on/off
-all 10 USB ports between the three PC's in all configurations
-deleted all USB drivers and restarted on both computers
-installed the appropriate drivers from samsung for each pc
-wasted 7 hours with samsung support troubleshooting to no avail
The USB cable is fine. The most promising progress is on my work PC, where I got Mini Kies going, connected and started the update, it finished decompressing the binary files, but then a USB not recognized warning pop up and kies kicked out the update.
I have installed, reinstalled the drivers for each system several times with samsung support. Nothing is working.
I don't know what else to do. This is the most frustrating experience in my life. Any suggestions or similar experiences that have been remedied?
I was having promblems also but eventually got it to work for me on an xp machine on stock jfd. It updated me to ji6 then I did the ka6 update when it was released. I gave up on my win7 system lol. Is your xp system 32bit or 64?
Sent from my SGH-T959 using XDA App
same here i have a win7 64 bit machine, i can connect to normal kies 1.51. i tried to update, it downloaded the files and just got stuck when it started putting it on the phone (luckily, it did not start the installation so i was okay).
mini kies shows that it recognizes my phone but crashes immediately after that.
i do not think the vibrant is supported by newer versions of kies, like 2.0.
I solved my problem by using my 32bit xp system.
edit: just FYI, i can connect to normal kies 1.51, sync my data and all that stuff. i also updated to ji6 thru normal kies, and I can transfer files and whatnot thru usb. I do not even think i needed to install the drivers manually
I downloaded Mini Kies 2.0 onto my windows 7 64bit machine and installed the Samsung drivers I have everything worked smoothly. I upgraded 3 phones to Froyo with no issues. here are the drivers I have
http://71.228.63.153/download/usb_drivers_GalaxyS_x64.zip
toeshot said:
I downloaded Mini Kies 2.0 onto my windows 7 64bit machine and installed the Samsung drivers I have everything worked smoothly. I upgraded 3 phones to Froyo with no issues. here are the drivers I have
http://71.228.63.153/download/usb_drivers_GalaxyS_x64.zip
Click to expand...
Click to collapse
I did the Same thing it worked for me as well
The only luck I've had is on a winXP 32 bit machine, but then it cuts off the installation when it suddenly says "USB Not Recognized" (despite, um, the fact that it recognized it at the beginning, otherwise I wouldn't have been able to initiate the update!)
I'll give those Win7 64 drivers a try at home, although I'm pretty sure I have downloaded the same ones in my quest for a solution.
Do you suggest plugging in the phone, then installing the drivers, or leaving the phone unconnected and restarting the computer then trying to connect, or ???? The biggest issue on the Win7 machine is the phone not communicating with it AT ALL. Not even showing up in device manager as unknown or anything.
Moved of: Samsung Vibrant > Vibrant General
To: Samsung Vibrant > Vibrant Q&A
Please put your questions to: Vibrant Q&A
SOLVED
I finally got it to work, after about 15 attempts! (on a win XP machine)
Here's what I did in case it will help someone else:
When I plugged in my phone, I saw two items in the USB list in device manager. One said "Samsung Android USB Composite Device" (internal SD?), and the other said "USB Mass Storage Device" (external SD?). In this configuration, I got kicked out of the install each time after it "decompressed the binary files".
So what I did on a hunch was go to the device manager and "update" the driver for the USB Mass storage device to the "ssadadb2.inf" file included in the Vibrant USB drivers available directly from Samsung's Vibrant page.
Selected "Samsung Kies" on the USB settings on the phone, turned on USB Debugging, opened Kies on the computer, plugged in the phone, and it did it's thing.
Only took 3 days to figure it out!
Yeah its been a hit or miss. I have win7 x64 on two laptops and my desktop. It works in the desktop and only one of the laptop and I installed the same drivers for all 3
Sent from my SGH-T959 using XDA App
toeshot said:
I downloaded Mini Kies 2.0 onto my windows 7 64bit machine and installed the Samsung drivers I have everything worked smoothly. I upgraded 3 phones to Froyo with no issues. here are the drivers I have
yeah it works for me too, i just installed these drivers and put usb debugging mode. upgrading just now. thanx
Click to expand...
Click to collapse
W/ WIN 7 64 Bit I upgraded my phone to Froyo.
I'm running win 7 SP1 64 bit.
Samsung told me that Kies mini and the driver is not compatible to 64 bit.
After some research this is what I have done and able to upgrad my phone to Froyo.
1. check the USB debugging.
- Samsung says to uncheck it. but if you do, you probably have MTP USB device error. So make sure your USB debugging is on.
2. After the you connect your phone, Samsung Kies Mini keeps crashing??
-Uninstall IE 9.
Solution is...
*Check the USB Debugging and Uninstall IE 9.
**Make your the battery is fully charged.
Connect phone
Start Kies Mini
I got so sick of Windows I switched to Ubuntu Linux. It's free and just as easy to use as windows. No crashes, no viruses, and it sets up as a dual boot so I can use windows when necessary.

[Q] Kies working fine, but Windows still lists "Unknown device"

I installed latest version of Kies in my Windows 7 Professional 64bits (UAC disabled, install was "ran as admin")
In the end of the installation process, Windows shows a balloon saying it is installing the driver for the device (note that there is no phone connected to the computer at that moment), but it fails saying that it could not find the driver for the device.
After installation finishes, I can connect the phone, open and use Kies normally, but if I go to Windows device manager, in the "Other devices" branch, it still lists an "Unknown device".
Any idea about how to solve this? I already searched the forum, but could not find anything that worked for me.
Thanks!
PS: I'm using the original USB cable from Samsung.
As long as you are able to connect and work via Kies just leave it. Just check how many people are having problem with Kies, you should consider yourself lucky that you don't have a connection problem
Regards.
Leave your phone plugged in and do a windows update. It should find the missing drivers.
You can find the drivers inside the dir where kies was installed, alternatively a copy is stored on my 4shared, link in my sig.
You can try installing the drivers and see if that helps.
Kies is a huge PITA, you may need to swap USB port and uninstall/reinstal for it to get its act together.
Thanks all who answered.
Unfortunately, Windows Update can't find any driver (already had tried that), and also asking to update the driver and setting it to search in the Kies driver directory has no effect either.

[BRICK][BOUNTY] Help me unbrick my X10a!

So apparently no one on here wants to help me unbrick my X10a for free so now I am going to offer money, no specific dollar amount until someone can get it working again, even if it's only for a short period of time. The link to my original thread is linked above, whoever gets it working can request the amount they think it was worth spending their time. Good luck, for both of us. I have seen several others with this same problem, if they would like to join in the bounty for us, and future bricks, feel free to leave a post of PM me.
I only skimmed over your last thread so let me ask a few questions.
Flashtool doesn't work at all?
So what version flashtool do you have and has it worked previously?
Did you unlock your bootloader?
When you connect to flashtool do you keep the back button held the WHOLE time?
EDIT:
Read your thread. Looking at the flashtool screenshot it looks very similar to an error i was having at one point. Even tough i had the drivers installed they didn't want to play nice. I downloaded Flashtool 0.2.9.1 and reinstalled drivers. When in flash mode i seemed to HAVE to hold the back button down the whole time.
I have tried it both ways, to hold it the entire time, or until I get the error, and let go as soon as it starts flashing. Both have the same end result of the aborting of the flash. Also, I've uninstalled and reinstalled the drivers several times as well as used Gordon's reset usb ids everytime I try.
Dacian said:
I have tried it both ways, to hold it the entire time, or until I get the error, and let go as soon as it starts flashing. Both have the same end result of the aborting of the flash. Also, I've uninstalled and reinstalled the drivers several times as well as used Gordon's reset usb ids everytime I try.
Click to expand...
Click to collapse
Are you sure you have a stable connection with your data cable?!! (USB port and cable work fine, not lose or something!!)
Question: The Green Led (the light that comes "on" while you're in flash mode) goes off while you are flashing?
Sorry all, lost my isp for a bit. Yeah, I'm sure about the USB connection. I have gone as far as to taping it down to make sure it doesn't move. lol. And when flashing, the light does stay on but there have been times where the light goes off half way through despite not being moved since it initialized connection.
What where you running?? Did you try seus???
Sent from my Lauda X10a using XDA App
Okay i had your error message too a few times here is what i did i re installed the x10 drivers it was included in flashtool then i flashed stock 2.1 it worked like a charm !
Sent from my X10i using XDA Premium App
Try this:
1- uninstall pcc and seus
2- run some aplication to clean the registry of the computer.
3- install again pcc and seus
4- connect your phone and let PC to install the drivers automatically.
5- use flashtool to flash a firmware designed for you baseband. Try android 2.1 first to test it.
If it still doesn't work try to do all in a computer with another windows version. Sometimes Windows 7 give a little problem to install drivers.
One computer that has never been used for this is excellent because there is no conflicts between applications and drivers
Sent from my X10a using XDA App
Ensure firewall and antivirus disabled on pc .
Kieron
Sent from my X10_AOSP using xda premium
kieronw3 said:
Ensure firewall and antivirus disabled on pc .
Kieron
Sent from my X10_AOSP using xda premium
Click to expand...
Click to collapse
Also turn off UAC (user access control).
Don't know if this will help too but have the latest version of Java installed.
Similar problem
So did your X10 work?
I am having the following problem:
Mistakenly wiped everything using xrecovery, even system.
Now no computer recognizes device (10 different systems with XP, Vista, 7)
unable to boot into flash, stuck at SE logo,
already tried different versions of flashtool, tried all the drivers including gordon gate, android drivers, pcc and seus but device still not recognized
Now is my X10 bricked or what!
Any hope anybody?
phillip.in said:
So did your X10 work?
I am having the following problem:
Mistakenly wiped everything using xrecovery, even system.
Now no computer recognizes device (10 different systems with XP, Vista, 7)
unable to boot into flash, stuck at SE logo,
already tried different versions of flashtool, tried all the drivers including gordon gate, android drivers, pcc and seus but device still not recognized
Now is my X10 bricked or what!
Any hope anybody?
Click to expand...
Click to collapse
Reinstall Windows and then:
1. Download the latest PC Companion from SE site.
2. Install it on your PC then open the programm and choose the "update service" there.
3. Then you'll find there a phrase saying "repair phone".
4. Then only follow the instructions of PC Companion to repair your phone.
And ALWAYS, ALWAYS, ALWAYS read FAQs, Guides, and Tutorials.
Format PC and install SEUS and PC Comp....
Disable UAC in windows 7
Restart PC
Follow procedure for flashing,with Flashtool 0.2.9.1...
Wait for drivers to be installed (must have internet connection)
Use Stock 2.1 Firmware file first!
Run it As Administrator
Change USB Cable, take shorter one and plug in in the back of PC (directly on motherboard)...
I had already tried pcc but I tried again as you said.
Formatted new PC with windows 7, turned UAC off.
Downloaded new pcc and ran the program.
After hitting the update link it says to connect the usb cable but after connecting usb cable it does not install the drivers. It says to disconnect and reconnect if nothing happens for 30 seconds so I did that and upon connecting usb cable it says unable to connect to the phone. I think the phone repair link is after the phone is connected to pcc but I can't connect to pcc.
And how do I connect the usb cable directly to the motherboard? Do you mean to open my desktop cabinet and locate the usb port on the motherboard, disconnect the already connected back and frontpanel usb headers and then connect the usb cable to the usb header on the motherboard?
Also tried flashtool 0.2.9.1 but no success, keeps trying to connect but to no avail.
I tried SEUS awhile ago, it's in the original post. I have uninstalled the drivers and reinstalled them several times as well as uninstalling Windows drivers and only using Gordon's drivers and that did not work. I taped the back button down on the device but that still did not work. I'm at a loss...
About installing the drivers, how about this:
Download the standalone drivers: http://www.megaupload.com/?d=U2PY6QOR and read these instructions provided from SE Support:
First, it is important to install drivers properly.
Start with the SEMC drivers.
When X10 is connected to the computer you should use ADB for X10 not ADB that comes with Googles SDK since it is not compatible with X10, yet. Use ADB for X10 included in attatchment, and write adb devices.
If you get something like CBxxxxxxxx then ADB works with X10. To kill old ADB server you can use adb kill-server command.
Good luck
(Note: i found this info over the net, it's kinda old, May 2010 but may works, who knows!)
Another option to install the drivers is to download and install this software: http://www.mediafire.com/?pq0idzzyasmzui0 This is the Unlock Software provided from cellunlocker.net which i used to unlock my X10, it has the option to install the drivers for you on the software folders (in windows start menu).
Try again after installing these, specially the second option (Unlock Client), who knows, maybe you'll get lucky!
Hope this helps!
How bout this. Start fresh from another PC.
Sent from my Sensation using xda premium
I have updated everything, I have actually started fresh from my Laptop to see if it had something to do with my home PC but it does the same thing. As far as ADB goes, you cannot access ADB if the phone is net set to debugging mode, adb will not recognize the phone, even in flash mode.
Will you can try this it has worked for a few others and if it does work JUST the thanks button is good for me. And just Be Patient go slow and it will get fixed if it's not already. And after you get it working then you can update too what ever Rom you wont.
Have Fun
http://forum.xda-developers.com/showthread.php?p=13163598#post13163598
---------- Post added at 01:41 AM ---------- Previous post was at 01:10 AM ----------
Patricks_book said:
Will you can try this it has worked for a few others and if it does work JUST the thanks button is good for me. And just Be Patient go slow and it will get fixed if it's not already. And after you get it working then you can update too what ever Rom you wont.
Have Fun
http://forum.xda-developers.com/showthread.php?p=13163598#post13163598
Click to expand...
Click to collapse
Also when you've got that fix you can update an root 2.3.3 Stock rom here:
I used Z's way:
http://forum.xda-developers.com/showthread.php?t=1196421
Or you can use Doomlords way:
http://forum.xda-developers.com/showthread.php?t=1196808
Also baba_baba has a real good tread here:
http://forum.xda-developers.com/showthread.php?t=1209749
And please remember too Thank these Developers for their work with the THANKS button

no hardware id

Hello All,
i had a problem with my phone every time plugging in galaxy s3 into windows (xp or 7) i kept getting no hardware id found after flashing my last rom.
just thought i would share how i resolve. very simple steps...
power off and remove battery
uninstall any drivers from windows
insert battery
power on device
once fully booted plug device back into windows and let it search for drivers.
all "should" now be working.
just thought it would be helpful to share as took me a while to find information online.
Got the same problem, with the difference that my S3 is fresh out of the box. Installed kies, drivers. Tried all of the usb-ports but nothing seem to work.
Was looking to root it but the connection (looks to me) would be an must...
W7
64 bits
Standard instructions are to use Samsung cable and a USB port on the motherboard .
jje
JJEgan said:
Standard instructions are to use Samsung cable and a USB port on the motherboard .
jje
Click to expand...
Click to collapse
jups, tried several cables and all of my usb-ports. Still no marriage between phone and desktop
funnily enough i just had this happen to me on my win 7 64bit ultimate, havent flashed any new roms just stock with cf root. All of a sudden my comp gave the sound effect if something was disconnected and I just got hardware id missing.
It did resolve itself though after I rebooted both phone and pc so unfortunately cant narrow it down further.
sandeman11 said:
Got the same problem, with the difference that my S3 is fresh out of the box. Installed kies, drivers. Tried all of the usb-ports but nothing seem to work.
Was looking to root it but the connection (looks to me) would be an must...
W7
64 bits
Click to expand...
Click to collapse
Is KIES loading while you are trying? If so, shut it down.
I've never had to load drivers. Windows always finds them on it's own.
missing hardware id (Win7 64 Home)
Same Problem for me.
I have never used Kies, but installed des Samsung Driver Package Ver. 1.5.6.0 .
For 3 month all worked fine with 2 Galaxy S III, 2 S II and 1 S I.
Since yesterday i have this trouble. Reinstall drivers, shut down phone... nothing helps. Changing USB-Ports, nothing...
Running on Stock XXBLG8 wird Syiha 1.5 or Speedmod K1-8 Kernel.
Would be fine if there is a fix or at least idea how to solve this
Just so everyone knows, the way i fixed this was very simple.
1. Uninstall Kies and All Drivers
2. Reboot Into Recovery (If Roooted)
3. Wipe Cache and Dalvik
4. Fix Permissions
5. Install LG8 Rom (rom installer from UpdateMe)
6. Reboot Phone
7. Disconnect From Internet (PC/MAC)
8. Re-Install Kies
9. Connect Phone to PC/MAC
10. Let Phone Install Drivers Again with Kies
11. Should Be Good-to-Go
1
-On Control Panel go to Programs and Features find Samsung mobile USB drivers and uninstall it, conect phone on PC via USB cable and wait for drivers to install.
or
2
-Use Kies and klik Troubleshoot problems with connectivity
That should solve the problem
nexusino said:
1
-On Control Panel go to Programs and Features find Samsung mobile USB drivers and uninstall it, conect phone on PC via USB cable and wait for drivers to install.
or
2
-Use Kies and klik Troubleshoot problems with connectivity
That should solve the problem
Click to expand...
Click to collapse
I actually tried that and didnt work for me so i started from scratch as if the PC never connected with the phone before.
nexusino said:
1
-On Control Panel go to Programs and Features find Samsung mobile USB drivers and uninstall it, conect phone on PC via USB cable and wait for drivers to install.
or
2
-Use Kies and klik Troubleshoot problems with connectivity
That should solve the problem
Click to expand...
Click to collapse
this worked for me but i have to repeat the process every time in reconnect my phone to the pc
It works
Hi guys,
I think I figured it out.
I was reading posts about this issue on multiple forums and there was one that caught my attention (I cannot remember where it was exactly- it was late in the night).
The thing is that the current Windows running PC's (or most of them) does not have the latest drivers and updates installed.
First I tried connecting my Galaxy S3 to the PC (which was not updated) and had the same errors you guys have. Then I connected it to my home laptop and this did not work as well. Today when I went into the office (@work) i tried again there and it worked flawlessly. Then it hit me:
The IT dept keeps the laptops and all the infrastructure up to date (including Windows updates). Therefore I tried again at home but this time with Windows up to date and guess what...it worked on both PC and laptop !
What I did (please keep in mind that all of my laptops and PC's are running Windows 7 - not sure if it works on older Windows versions):
1) Uninstall Kies and the related USB driver it installs (Control panel -> Programs and features)
2) Let Windows install the latest updates (Control panel -> Windows Update) and let it reboot your machine and finish installing things.
3) After you're logged back into Windows just plug your USB cable into the phone and PC/Laptop on any of the USB ports and it works !
Hope this helps !
Regards,
Mike
wtf i update kies software, here the same problem. :crying::crying:
i reinstall Kies more then 3x, but the problem is exist!
i try other usb connection, same problem..
now when i connect my Galaxy S2, same prob.
and all that after i update Kies Software to 2.3.
Where can i found an older Version?
Greetings
---------- Post added at 10:34 PM ---------- Previous post was at 10:17 PM ----------
Samsung Composite Driver is exactly the Problem on Windows 7 X64!
I installed these drivers SAMSUNG_USB_Driver_for_Mobile_Phones and this solved my problems with the ID issue. Here is the link https://www.dropbox.com/s/fm9b12xy3r0t07b/SAMSUNG_USB_Driver_for_Mobile_Phones.zip. Good luck guys
i try it with only Windows Update Driver that was not the Solution, that was without ADB Support..
I resolve the Problem, :good: if anyone have the Problem further, try this..
- uninstall all Samsung Driver & Kies from your System
- then you need the tool USBDeview
- uninstall with that tool all unused or Samsung USB Driver from your Sys
- Reboot your Machine
- after that clean your registry (example with CCleaner)
- Reinstall or Update your Motherboard System Driver (Only USB)
- Reboot your Machine
- Install Now Samsung Kies again
- again Reboot your Machine
- and last disable USB Debugging on your Phone and activate it again
now you can plug your Device and hopefully with MTP and ADB Support and without Hardware ID Error.
Best Regards
This happened to me since I updated Kies. What works for me:
Go to settings -> more (under data usage) -> USB Utilities -> connect storage to PC -> OK
Windows now does recognise the phone and you can browse the phone as a drive. Kies will give you an error.
Turn off USB Storage, disconnect the phone.
Take out the USB cable and put it back in and Windows should detect the phone properly now and Kies will recognise it too.
this worked for me first time
Flashed rom, new error of mulfunctional USB and not recognized phone on USB. Interesting is, that another phone, but the same type, same ROM was recognized. Nothing from above helped (reinstalled progs, restarts, reinstalled ROM, tweeking in kies)
Helped only reinstalled drivers posted above by gee2012 (SAMSUNG_USB_Driver_for_Mobile_Phones)! Thanks for this.
gee2012 said:
I installed these drivers SAMSUNG_USB_Driver_for_Mobile_Phones and this solved my problems with the ID issue. Here is the link https://www.dropbox.com/s/fm9b12xy3r0t07b/SAMSUNG_USB_Driver_for_Mobile_Phones.zip. Good luck guys
Click to expand...
Click to collapse
Big thanks, these drivers sorted it out for me though the ones you hosted have gone from your dropbox I found more easy enough because of the name you supplied.
Just out of interest are those having this problem using an AMD chipset or a gigabyte motherboard? My main PC has both and its the only system I am having this issue with.
had this happen again after flashing a new rom from a full wipe. un installed the drivers then reconnected and fixed the issue.
Zrbyte said:
Big thanks, these drivers sorted it out for me though the ones you hosted have gone from your dropbox I found more easy enough because of the name you supplied.
Just out of interest are those having this problem using an AMD chipset or a gigabyte motherboard? My main PC has both and its the only system I am having this issue with.
Click to expand...
Click to collapse
Funnily enough yes, I am using a FX-6100 and a GIGABYTE GA-970-DS3

P9000 Not recognised by PC

For some reason when i plug in my p9000 the phone is not recognized by the PC it only charges the phone. It was previously working and all the relevant drivers have been installed . Is the problem with the latest stock rom or is there something wrong with my pc which is running latest version of windows 10
Its windows 10. You have to install the mtp usb driver for it to work
Starting from 2 days ago I have had this same problem. It happens randomly. I didnt find the clue why it is happening. What I did is: Device manager, Unknown devie(as that there is no driver installed for this phone), Update driver, Browse my computer, Let me pick from a list: and here you will see 5 drivers(at least that is on my pc). Try choosing randomly between these 5. For me 3rd worked while other ones did not.
I think that some last update screwed our phone, Windows update.

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