Not sure if this is the right fix? We've added this issue to our memory dump diagnostic which can confirm.
You have a computer that is running Windows 7 or Windows Server 2008 R2. However, the computer crashes during the startup process before you are prompted for user credentials. Additionally, you receive a Stop error message that resembles the following:
STOP: 0x0000006B (Parameter1, Parameter2, Parameter3, Parameter4)
Note The four parameters in the Stop error message may vary, depending on the configuration of the computer.
This issue occurs because the Bootcat.cache file is corrupted or because the size of the Bootcat.cache file is changed since the last successful start.
Note The Bootcat.cache file is located at %SystemRoot%\system32\codeintegrity.
To resolve this problem, apply Service Pack 1 for Windows 7 and for Windows Server 2008 R2. Microsoft provides no supported hotfix for this problem. For more information about this service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
To work around this issue, start the computer from the disc drive or from the USB drive by using the Windows installation media. Delete the Bootcat.cache file, and then restart the computer.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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