BSOD at startup everytime.

Day before yesterday did a virus scan and system all good.

Yesterday morning did a windows update and installed 3 updates and a fourth failed to install.

Before I got a chance to see which one it was I get a BSOD Bad_Pool_Header. System restarted but I had to go to work so I left.

Gf said she had a BSOD pop up when she was using the computer than restarted and it was fine. I had no issues the rest of the day.
I even checked device manager to see if anything was causing problems. No issues there.

This morning I go to turn the computer on and I get BSOD Bad_Pool_Header and I cannot do anything else.
-I tried booting into safe mode but I get a BSOD Bad_Pool_Header
-I tried safe mode with networking. Same BSOD
-Last known good config. Same BSOD
-Disable authenticated sig drivers. Same BSOD
-Launch windows repair. Same BSOD

Pretty much anything I do it gives me the same BSOD without giving me a chance to troubleshoot.
I tried every single advanced option and still same BSOD. I can't perform any troubleshooting at all or startup windows.
The only thing it lets me do is go into BIOS.

I even tried booting from windows cd and I still got the same BSOD.

I know bad pool headers usually involve driver issues which I've had before and I fixed easily without complications. Now I'm just lost for words, never seen anything like this happen. Windows just doesnt start period.

BAD_POOL_HEADER
Stop: 0x00000019
BSID: 0x0000000000000020
BSID: 0xFFFFF8A00011BA40
BSID: 0xFFFFF8A02011BA90
BSID: 0x0000000005050105

Is my OS just completely lost now?

if even booting from a windows cd didn't help, you have some hardware problem. I recommend you disconnect all 3rd party things plugged into your computer and just leave monitor/mouse/keyboard in. Startup like that and see if there's a difference.

If no difference, you must check hardware. Reseat all your memory or remove a chip or two randomly to see if it's a memory stick problem. Reseat your video card (if it's the Geforce 460 that you mention)

Also if you are overclocked, reduce some of your settings.

I hope thats the case. I do have a few third party items since its my gaming machine but never had issues with them. Didnt get a chance to check hardware since I had to head off for work but I'll check everything inside when I get home tonight.

Yea, so I removed all third party items, make sure all my hardware was in place and connected, left the keyboard and mouse than started up to the the exact same error.

I took out the hard drive and connected to a known working system and it still gave me the same error.
It always heads to the Windows loading screen than BSOD.

I'm going to set it up as a secondary drive next and scan the drive next

This does not make sense, you are getting the SAME error when you BOOT with a windows 7 cd? How about disconnecting the hard drive while you boot with a win 7 cd? Does it still crash?

Placing a win 7 HD into another computer may create new problems over existing problems.

I put the recovery disk in not win 7. Sorry for the confusion.

I downloaded the manufacturers diagnostic software for the hard drive and after 2 hours it checked out ok.

But as always when I try to startup windows it goes to the windows loading screen than I get the BSOD.

Looks to me that Windows became corrupted on the drive. Now I will boot to a Win 7 cd when I find one.

ok i see. You stated in the original post that you did boot with a windows cd that's why I was surprised.

All in all it does seem that something is corrupt on the windows install itself and not hardware.

Find a windows CD and go to the recovery console and run chkdsk /r to see if there are bad software sectors that need repair.

If not, you'll need to reinstall clean.

Yea, sorry for the confusion. I need look at my posts more often but really hoping I dont need to reinstall.

Do not like spending my day doing that when I'm not getting payed for it.

Did you do the Memtest86+ diagnostics as suggested by James? The crash you get points to memory or a driver, so checking the memory should be a priority.