0xC0000005

I'm sorry, I started a thread in the storage devices section thinking I had a corrupted Hard-drive, but now i'm pretty sure it's my memory.

here's a link to it http://www.devhardware.com/forums/storage-devices-80/corrupted-hd-185350.html

I finished a Zero fill, tried to reinstall XP first. Was going to do a multi-partition xp/vista set-up, but XP couldn't even copy the files needed to install, kept saying both that XP installtion CD could be faulty and that the format on my HD wasn't a proper windows format. So I say "fine," and i delete the partition i created, and let the windows software create on itself, and I got the same error, even with it's own.

Tried install Vista (no multi-partition), and I got the same error I was getting before. "An unexpected error has occurred. Verify that the installation sources are accessible... error code: 0xC0000005"

Now it didn't take much google time to find out that 0xC0000005 is very bad... usually found at the bottom of a BSOD message. So... if i program a flashkey to do a memory test, will it accurately diagnose faulty memory over a faulty motherboard? This ram has been so immaculate, and was hella expensive when I bought it. I'd be very disappointed if it was faulty.

EDIT: Also the BSOD I was getting before I zero-filled the drive was a stop 0x0000001a if that means anything to anyone

update: so i tried installing windows with just one stick in, just to see what would happen. One stick and the thing just does nothing, no bootup screen, just a black screen with a blinking cursor. The other stick, and when i "press any key to boot from cd" i get the windows boot-up manager, telling me windows failed to boot, possibly to a recent hardware change, and to use the windows CD to repair, WHEN I HAVEN'T EVEN INSTALLED IT YET!!

Definitely run MemTest+86. It can be burned to a CD-R or I believe the Windows Vista installer disk might actually have it on there as well but I'm not positive.

the problem is that it won't even boot from an external device (such as my windows CD) with just one stick in there. with just one stick, it just gives me a black screen with a curser using one stick, and those messed up errors with the other. I just wish there was a way i knew it's not the mobo. replacing the ram i have or the motherboard wouldn't be THAT expensive i guess...i just dont want to waist money. i guess on the positive side, if it turns out not to be the ram, but the mobo I've got 4 gb of ram now.