Vista - BSOD after SP1 RC and can't boot

Ok, here it goes, I and running Vista Ultimate 32-bit on and AMD Athlon 64
3000+ DFI LanParty UT 250gb NF3, 2 gb ram. Outside of windows explorer
crashing is I open up more than 3 windows at a time, I've had no real
problems, until now. I found out about eh vista SP1 RC and decided to give
it a try, and since installing it Vista would boot up and and withiin 10 mins
of being in my desktop I'd get a BSOD. This happened every of the close to
40 times it did this(I didn't know it was doing it all night until I woke
up). So I decided to run my memtest86 +v 1.55 that came with my BIOS to see
if it was a bad section of ram. That gave me a few errors at first, but the
second time I ran it it came out clean. But since then Vista wouldn't boot,
it would just lock up at different points of booting, so I tried the Windows
Start-up Repair tool that's on the DVD, and this is what it said:

Cannot fix the problem
Root causes:
Unknown Bugcheck 7e 0xc00000005 0x841393eb 0x88933c30 0x8893392c
System files integrity check error code 0x2(time 686998ms)

Also I've got Fedora 8 64-bit dual boot, and it works just fine(that is what
I'm using to type this).

Can somebody please help me?