Windows 8.1 Bitlocker - automatic shutdown during password prompt

Hi,
I´ve activated Bitlocker on my hard disk.
As I have no TPM socket on my motherboard, I activated a group policy as described here:
http://www.howtogeek.com/howto/6229/how-to-use-bitlocker-on-drives-without-tpm/
"Require additional authentication at startup"> "Allow Bitlocker without a compatible TPM"
Encryption was completed and everything worked fine after that.
But when I next time started my pc it suddenly shuts down while I typed my password.
The shutdown is at about 1 minute after the Bitlocker screen appears but sometimes it is even earlier. Even if I start typing my password, the pc shuts down.
Are there any bios settings that could interrupt Bitlocker? Are there recommendations for the bios setup when using Bitlocker (boot priority, power settings,..)? Or what else can it be?
Regards

Hi，
Meanwhile, have you checked the power performance? Is it using a battery or a electric connector, try to switch the power supply method and make sure the power is stable for your computer and make sure that the power supply has enough wattage to appropriately
handle the installed devices.
And make sure all drivers are up-to date.
Actually I never heard that a bitlocker can cause this issue, have you tried some advanced startup option like startup repair I mentioned in my previous reply, or other listed in the following link? what is the result?
http://windows.microsoft.com/en-in/windows/advanced-startup-options-including-safe-mode#1TC=windows-7
If possible, I suggest you take your pc to a native repair shop to find if something we missed.
Yolanda Zhu
TechNet Community Support

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Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]

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