HELP! I can't login to windows, hangs on CLient Security!

[setherd]

AVG said it found a trojan in an IBM file. (I can't remember exactly)
I thought it was a false positive but told it to to put it in the virus vault and I was going to look at it later.
windows then downloaded some critical update and rebooted.
now it hangs when communicating with the IBM user verification manager. I can't logon in safe mode either.
I think the file I quarantined was part of it.

any advice is appreciated.
luckily I just did a disk image a week ago if it comes to that.

I dual boot linux and am posting from it.

[ryengineer]

Can you boot into Recovery partition?

[setherd]

I just tried to. I got a BSOD.
not sure why. I never tried the emergency partition before.

[setherd]

I finally got it to work.
I first restored just the file I have loacked away. that didn't work
then I restored the entire security folder. that didn't work.

finally I just restored my entire partition (C drive) that worked.

on a side note. acronis true image worked perfectly. I recommend it