Enterprise Bitlocker users please do not upgrade the official version of WP8.1

Computer Store News:

Windows Phone 8.1 official and Lumia Cyan firmware updates have been pushed to the global Lumia 925 and Lumia 525 phones, unfortunately the first serious bugs. When the enterprise user's WP8 device uses Bitlocker encryption before, the upgrade will refuse to start, prompting that the U disk drive needs to be inserted.

Screen display:

• Bitlocker recovery

• To restore this driver, please insert the USB drive containing the Bitlocker recovery key

• Bitlocker needs to recover the key to unlock your device because the trusted module is inaccessible.

• For more information, please visit http://windows.microsoft.com/recoverykeyfaq on a PC or other mobile device.

• Please press Enter to restart, or try again

• Please press Esc or Win to bring up other recovery options

This question is in Nokia Support Forum It is strongly reflected, some people have already encountered and are complaining. If you also use the Bitlocker service, be careful. The only solution currently is to use Nokia Brush or Recovery Tool to reset the phone, but the data that is not backed up in the phone will be lost. At present, Microsoft has not given a reply.