BSOD - Fatal System Error c000021a - 0xc000003a

I hope someone can help me with this. I'm a newbie and not computer savvy so please bare with me. Our Dell laptop m1530 (vista) is showing the BSOD with the following message....STOP:c000021a {Fatal System Error}
The Session Manager Initialization system process terminated unexpectedly with a status of 0xc000003a (0x00000000 0x00000000).
The system has been shut down.
I have tried Repair Your Computer, running it in Safe Mode, and Last known Good Configuration with no success. All it does is show a blue screen with writing on it for a split second, reboots itself, and then back to BSOD. I've tried running the original DVD that came with the laptop but that doesn't seem to work either. The disc loads and then just hangs on a black screen with a white cursor. I've also tried removing and putting back the hard drive and ram sticks, but no luck.
Does anyone have any suggestions on what I can try next or if this problem is even fixable?
Any feedback would be greatly appreciated.

 

Welcome to Majorgeeks!

That's a tough one, best summed up here by Andre Ziegler I think:

Vista needs a repair installation, the problem may have been caused by malware so after a repair, you'll need to check for any remaining malware.

 

Thanks so much for your reply Satrow. I had read that thread on one of my many searches on the net on how to fix this problem. I don't think it applied to my situation as I had not restored my hard disk from a back up. I think it is more likely to be malware as this all started when I my husband was surfing on Google Chrome and the system just froze. He tried rebooting and got the BSOD.
How do I perform a system repair installation? Like I mentioned, I tried running the Vista reinstallation DVD that came with the laptop, but that doesn't work. After the "Windows is loading files..." is complete, the screen just hangs on a black screen with a white cursor.