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  1. Horvath Gyorgy1's Avatar
    Ever since I upgraded my Lumia 640 to Win10, it has not been properly recognized by my PC (Windows 7 Home 64 bit) via USB. I have to try to manually install the driver for MTP USB Device which succeeds in about 1 case out of 10. When it succeeds, the "MTB USB Device" title changes to "Lumia 640" and then I can see my files and folders on my phone as well as on the SD Card. (I put this same question on Microsoft's answer site but I got no useful tip.)
    04-21-2016 02:36 AM
  2. RumoredNow's Avatar
    Is your 640 encrypted?

    If so you have to unlock the screen with your PIN.
  3. charlatan1978's Avatar
    If you search these forums it is quite a common problem.
    Can I ask what build version you are running on your phone?
    04-21-2016 05:18 AM
  4. Horvath Gyorgy1's Avatar
    Latest non-insider 218 but it was the same with version 164
    04-21-2016 06:28 AM
  5. Horvath Gyorgy1's Avatar
    It seems nobody cares about this problem. So you have a telephone that has a Microsoft logo on it and cannot connect to a Microsoft Windows system. THAT IS ABSOLUTELY RIDICULOUS.
    08-02-2016 01:50 AM
  6. thron's Avatar
    It seems nobody cares about this problem. So you have a telephone that has a Microsoft logo on it and cannot connect to a Microsoft Windows system. THAT IS ABSOLUTELY RIDICULOUS.
    To be fair, your thread has a "Best Answer" already chosen. Some people just glancing in may see that and assume your problem has been resolved.

    Did this happen when you tried interop/FS access? (I had this happen while rooting my device)

    I did a combination of a number of things:
    1) Unplug the device, go into your device manager (in the search box of your Windows 10 pc, type "Device Manager")
    2) In the top panel, click "View" -> Select show hidden devices
    3) Click > beside "Portable Devices," if you see MTB USB, right click & uninstall
    4) Do the same for "Universal Serial Bus controllers" and "Universal Serial bus devices"

    Reboot your PC.
    Startup, see if it works.

    If it doesn't, don't be surprised.. mine randomly started working after repeating steps I'd done 10 times before..

    If the MTB issue returned, follow those steps again - except this time, shut down the PC and plug in the device. Once plugged in (and the device is on), start the PC like normal.

    If this fails, repeat the above steps, except TURN OFF the phone before you plug it into the PC - turn the PC back on; once on, turn the phone on.

    If still no luck, repeat, repeat, repeat. I have no explanation as to why mine decided to play nice after repeating the same steps many times before!
    08-02-2016 02:08 AM
  7. Horvath Gyorgy1's Avatar
    But isn't that ridiculous? Restarting, retrying, dismounting drivers???
    Man, this is supposed to be a MICROSOFT Lumia phone!
    08-02-2016 02:16 AM
  8. thron's Avatar
    It is, but in my experience it isn't something that happens "on it's own," it's more of an operator error.
    Unless of course, you weren't trying to root it. Then, this behavior defies explanation.
    08-02-2016 02:19 AM
  9. Horvath Gyorgy1's Avatar
    I was not trying to root it all the less as I don't know what "to root" means in this context.
    08-02-2016 01:30 PM
  10. daimv's Avatar
    I find that sometimes you have to wait a bit for it to be recognized. You could also try opening the phone companion app or however it's calles and wait for it to recognize your phone.

    I haven't had problems with my 640.
    ananve and RumoredNow like this.
    08-02-2016 01:47 PM
  11. daimv's Avatar
    Also you posted at 2AM in my timezone and then at 6am were complaining nobody cares...

    Different timezone or not, have a bit of patience. And remember the people who post here usually aren't microsoft employees but users like you.
    libra89 likes this.
    08-02-2016 01:50 PM
  12. thron's Avatar
    I was not trying to root it all the less as I don't know what "to root" means in this context.
    Did this happen after a recent update?

    Like daimv stated, sometimes it can take a moment before it's recognized? (lots of files for the USB to page through = leave it plugged in and have longer patience before expecting it to show up as navigable media)
    08-06-2016 12:59 AM
  13. RumoredNow's Avatar
    Is your 640 encrypted?

    If so you have to unlock the screen with your PIN.
    08-06-2016 11:39 AM
  14. Horvath Gyorgy1's Avatar
    Also you posted at 2AM in my timezone and then at 6am were complaining nobody cares...

    Different timezone or not, have a bit of patience. And remember the people who post here usually aren't microsoft employees but users like you.
    No, I posted this issue 4 months ago now.
    08-11-2016 12:53 PM
  15. Horvath Gyorgy1's Avatar
    Did this happen after a recent update?
    No, this has been happening since I upgraded my Lumia 640 to Windows 10
    08-11-2016 12:55 PM
  16. Horvath Gyorgy1's Avatar
    Is your 640 encrypted?

    If so you have to unlock the screen with your PIN.
    No, it is not
    RumoredNow likes this.
    08-11-2016 12:55 PM
  17. Maurizio Troso's Avatar
    That's seems a unique than rare case
    08-11-2016 12:59 PM
  18. RumoredNow's Avatar
    No, it is not
    Maybe try this tool: View any installed/connected USB device on your system No install needed, right click the exe in the folder and run as admin.

    Delete the MTP drivers you added manually and delete any drivers marked Lumia or Nokia. Plug the phone into USB and let a fresh set of drivers install.
    Horvath Gyorgy1 likes this.
    08-11-2016 01:09 PM
  19. Horvath Gyorgy1's Avatar
    Maybe try this tool: View any installed/connected USB device on your system No install needed, right click the exe in the folder and run as admin.

    Delete the MTP drivers you added manually and delete any drivers marked Lumia or Nokia. Plug the phone into USB and let a fresh set of drivers install.
    Thanks for the tip, I will try it.
    RumoredNow likes this.
    08-11-2016 01:43 PM
  20. mxyztplk's Avatar
    thron: Thank you for the instructions. I did not know there were problems in this area until I saw this thread.

    When I saw it, I decided to try connecting my Lumia 640 LTE, which I had updated to Windows 10 months ago, to my Windows 10 AU system. This had earlier worked with the 640 on Windows Phone 8.1, with a Windows 8.1 PC, but I had no occasion to connect the 640 to a PC since then.

    When I connected it, the Lumia 640 LTE alternately appeared and disappeared from the list of devices under "Computer." Further, within Device Manager, the 640 LTE alternated from being reported as "working properly" to not being so. This alternation of state occurred over matters of seconds. Further, this occurred in both USB 3.0 and USB 2.0 ports.

    I disconnected the 640 and uninstalled all hidden devices for it from within Device Manager, as you recommended in your post, and then rebooted.

    After reboot, I reconnected the 640. When connected to a USB 3.0 port, it was then recognized solidly. However, when connected to a USB 2.0 port, it was still not recognized solidly; i.e., it sometimes disappeared and then reappeared a few seconds later.

    I also connected the 640 to a USB 2.0 port on a Windows 7 system. [I had not connected it before to that computer.] The 640 was solidly recognized.

    Hopefully, what appears to be driver problems will eventually get sorted out. In the meantime, I will only use a USB 3.0 port if I wish to access the 640 from my Windows 10 AU system. Or, alternatively, I can access the 640 from a USB 2.0 port on the Windows 7 system.

    (I also notice that, on the Windows 10 AU system, if I minimize the Explorer window showing the phone, it pops up after a short while. This indicates to me that it is likely that some event has occurred, even when the 640 is connected to a USB 3.0 port.)

    All of this apparently points to driver problems, although it is not clear which driver is flaky.

    If uninstalling the drivers does not solve the problem for the OP, as a temporary workaround I would recommend trying different USB ports and/or different PC systems.
    Last edited by mxyztplk; 08-11-2016 at 10:19 PM.
    08-11-2016 09:55 PM
  21. Horvath Gyorgy1's Avatar
    Update: it seems that after the Anniversary Update now my Lumia is recognised instantly by my laptop. Cheers.
    RumoredNow likes this.
    08-22-2016 12:39 PM
  22. Perry Turner's Avatar
    Just a heads up, this isn't a driver or an OS issue, it's a USB cable issue. Not all USB cables allow data transfer, some are charge only. I was having issues with Windows 10 not finding my phone, switched to a "thicker" USB cable and it was instantly found by my computer.

    I realize this is an old thread, but thought I would add this bit of information.
    Doug Choz likes this.
    11-11-2016 12:48 PM
  23. Doug Choz's Avatar
    Thanks Perry. You helped solve my connection problem.
    01-22-2018 06:52 AM

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