BSOD - The driver is mismanaging the system PTE... - Memory management

I've gotten 2 BSODs within the past hour trying to reinstall Windows 7 on this machine...

I'm helping out a friend and I've ran Memtests and ran across some errors while it was doing so, and it ended up going to an error count loop where it'd reset the counter and jump back in half a second to the same memory count.

While reinstalling Windows 7 for the first time, I got the BSOD saying "The driver is mismanaging the system PTES... so I googled that error and it turns out some people were talking about nvidia card drivers. I am using an ATI Radeon card but I doubt there's anything I can do if I can't even boot up to an installation, correct?

Just need to know where I should go from here... Getting another video card or replacing the 2 sticks of memory.

Well, Windows 7 was on it before reinstalling but I kept getting all these random BSODs so I tried reinstalling, thinking maybe the OS was corrupted... and now I'm getting more just simply trying to install Windows 7 again.

There's no OS installed. I'm getting the BSODs when trying to install the OS.

That's what I've done the past 2 installation attempts, formatting the drives. Actually deleted all the partition until there was nothing but raw unallocated space.

I've ran a hard drive test on the 1TB HD when I was running hardware diagnostics. It didn't report any errors at all.