Stop Blue Screen Error 0x0000006B during startup of Windows 7

Blue Screen Error

If your computer running Windows 7 throws an BSOD stop code 0x0000006B error message during startup, then you probably don’t have Windows 7 Service pack installed. The stop error occurs after crash during startup, even before displaying the login credentials.

What Error?

The exact error message looks like this:

STOP: 0x0000006B (Parameter1, Parameter2, Parameter3, Parameter4)

The four parameters in the Stop error message may vary, depending on the configuration of the computer.


According to Microsoft, this problem arises because of corrupted Bootcat.cache file or due to the size of it changed since the last successful start.



To fix this problem, first you need to start the computer from the disc drive or from the USB drive by using the Windows installation media. Browse to /Windows/System32/CodeIntegrity/ folder, delete the Bootcat.cache file, and then restart the computer. If you have never created the Windows installation media, then you can use the Ubuntu or any other Linux live CD to delete the bootcat.cache file.

To see that this problem doesn’t arise again, make sure to download and install Windows 7 Service Pack 1. Microsoft have updated some system files in the Service Pack 1 to fix this problem permanently.

Kiran Kumar

Hi there! Kiran Kumar is an Engineer by profession, and loves blogging primarily on Microsoft Windows operating system and also enjoys reviewing software and products. Currently, he is exploring Windows 10 and you will see a lot of articles on know-how about it. When he is not writing for TWP, he enjoys time with his Family, listens to lot of music, enjoys Biking, and occasionally plays racing games on Xbox One.