1. Windows Central Question's Avatar
    My 640 after downloading and preparing to install the new update just continually reboots. Goes from Microsoft screen to WM10 boot screen then restarts to do it all over again. Battery has been taken out and it still does it. Any help would be great. Thanks
    12-10-2015 02:03 AM
  2. MP3Mike's Avatar
    This sounds like the known issue that occurs if you did a hard-reset while on build 10581. Your only choice is to do a hard-reset, via the buttons, or revert to WP8.1 with WDRT and then upgrade again. (Just follow the instructions for your phone not being found.)

    Hint: Even a hard reset doesn't 100% fix the problem for most people, you can use the phone but can't hook it to a PC via USB. Reverting to WP8.1 via WDRT appears to completely fix the problem.
    12-11-2015 05:19 PM
  3. jeffchapik's Avatar
    Same thing here. WDRT fixed it, then successfully upgraded to 10581.29. Don't freak out. It'll be fine.
    12-11-2015 05:20 PM
  4. halflifecrysis's Avatar
    Make sure you have installed Windows insider app and accepted fast updates.

    Restart the phone and check again, the update should say specifically "Insider XXXX.29 update"
    12-12-2015 03:18 PM

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