Support for Windows Vista without any service packs installed ended on April 13, 2010. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows
After you enable the BitLocker Drive Encryption feature in Windows Vista, you may receive a "Stop 0x0000007E" error message that resembles the following:
STOP 0x0000007E (parameter1, parameter2, parameter3, parameter4)
The problem may occur when certain drivers, such as a chipset driver, are installed on the computer before you enable the BitLocker Drive Encryption feature.
Service pack informationTo resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
Hotfix informationTo resolve this issue, install the hotfix that is described in KB 929637.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
929637 Error message during Windows Vista startup if the Nero InCD program is installed and if the "Special pool" feature is enabled in the Driver Verifier utility: "Stop 00000050"
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 930979 - Last Review: Apr 14, 2010 - Revision: 1