Latest Windows 7 Update on Sony Vaio - Now will not load properly

[Safeguyz88]

I updated to the latest Windows 7 service pack this morning, upon restarting I can log in however nothing loads up. My screen is black, I am able to move the cursor. When pressing CTRL + ALT + DELETE a error message comes up stating:

"Failure to display security and shut down options. The logon process was unable to display security and logon options when CTRL+ALT+DELETE was pressed. If the operating system does not respond, press ESC or restart the computer by using the power switch."

I am able to boot in to safe mode, I have attempted a system restore to the time before updating this morning. However this stays at initializing for at the moment around 3 hours. I have no idea now what to do, I purchased this laptop in November 2011 which came preloaded with Windows 7 Home Premium Edition 64 bit.

Any help is much appreciated, if you need anymore details please ask and I will provide them.

 

[Safeguyz88]

Upon cancelling the system restore and attempting to load again, after log in it stayed black for a while then BSOD, "BAD_POOL_CALLER" and shut down. I was unable to get the error number, I will attempt to load again and see if it happens/if I can get some numbers for you guys.