Corrupted HD

Last night I was just playing some WOW, computer was working just fine when out of nowhere, BSOD!

Restarted it, BSOD when the windows logo would normally start. I remembered when my last sound card fried, it was cuasing this, so I pulled that out and tried again, no luck. I tried to use the recovery tool fromt he windows disk, and this caused a BSOD once I selected which widows installation I wanted to attempt to recover.

Now after this, just trying to boot it up after giving up for 20 minutes, one of two things will happen. I get just a blank screen after the system boots with a blinking cursor, or I get a message (i'm sorry, when i get home from work I'll ahve to post the exact error message, I have them written down at home), that states that this file may be corrupt, that the files checksum does not match the processed checksum. So just to cover all my bases, I yank all my ram dimms accept one, no change, take that one out and replace it with another, no luck. So I put them all back in, and I actually see the windows logo this time (i got a whole few seconds further) then the BSOD again. So i just say I'll reinstall windows and it tells me an error has occurred, and to make sure the targeted volume is accessable. I am in the long process of zero-filling the drive now, to see if that will work. I just wanted to know what you guys thought.

can any concur whether or not it is just my hard drive?