Windows Vista BSOD in vista, will not boot into windows.

last night i was using my laptop as normal, surfing the web when i got a blue screen of death and the computer shut down. I couldn't read what the BSOD said before it restarted. Now I can no longer boot Vista. Luckily I have Windows 7 installed on a partition which is what i am using now, so apparently it is not a problem with the computer itsself, just vista.
When i boot vista, the little status bar that comes up before the log on screen should load stays on the screen for a good 5 mins, and then the screen goes black for about a min and then i get the BSOD again, which this one said:
STOP: c000021a {Fatal System Error}
The initial session process or system process terminated unexpectedly with status of 0x00000000 (0xc0000006 0x00100418).
The system has been shut down.

I have tried booting in all options it gives me for the vista partition. No luck. The safe mode gets stuck after avgrkx64.sys and won't load.

I do not have a repair disk for Vista Ultimate 64 bit, which I am running, seeing that my boyfriend installed it for me and I do not know the location of his CD.

This is an HP Pavilion dv2000 laptop, i bought it in 2007.

If anyone could help me out with this, that would be greatly appreciated. I can access the vista part of the partition from the windows 7 partition, as i have started to back up my files in case i need to do a restore. Thank you.

 

I had a similar problem on a dual boot system (Ubuntu being the other OS). But it was caused by one of my two hard drives physically failing. If you are sure that is not an issue? Otherwise, are you in a position to boot into Windows (Vista) Safe Mode? Or Last Known Good (If that exists in Vista)? Or does also running Windows 7 preclude that option? Sometimes, even without running various diagnostics in Safe Mode, simply booting that way, then closing, can cure a problem - or - within Safe Mode doing a System Restore...

Edit - sorry - I see you tried Safe Mode. Too quick off the trigger...