Blue screen on login

Hello,

I've been given a computer to look at which has a problem of blue screening as soon as you login with the error code: 0x000008e 0xc0000005 and some other random error numbers after it.

I updated the video graphics drivers as I read somewhere the GPU drivers could be a cause of the issue, which worked for about 8 restarts but then started blue screening again. I have ran a full Microsoft Security Essentials scan, as well as a Malwarebytes Anti-Malware scan with no dice. I have ran McAfee, Norton and Kaspersky rootkit scans, but again, nothing came up. I've tried running a WIndows file integrity check but cannot do so, as Safe Mode requires the RPC service to be enabled and I can't boot into normal mode. I have also ran Memtest on both RAM modules (2GB) with again, no dice.

I have uploaded a minidump here for analysis as I'm running out of ideas fast.

All help is appreciated.