Below is one possible solution:
"Symptoms: 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) PROCESS1_INITIALIZATION_FAILED
STOP: 0x0000006B (Parameter1, Parameter2, Parameter3, Parameter4)PROCESS1_INITIALIZATION_FAILED
Causes: 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.
Solution:
•Manually delete bootcache.cat from \Windows\system32\CodeIntegrity.
◦If Windows is stuck in a repair and restart loop, insert Windows CD and use recovery options to "recover" in order to boot at least once to delete the file.
•Or download the hotfix here: http://support.microsoft.com/kb/981833"
Source:
http://its.isber.ucsb.edu/troubleshooting/windows-7-bsod-process1initializationfailed
If that is not the problem please provide more detailed information on the blue screen error.