Security → I used it several times..

I used it several times and it does remove Vundo (as does Combofix and even Windows Defender). Problem is, there's obviously still some kind of infection in IE that causes it to download Vundo again and re-infect the computer. Nothing seems to find it. This work-around at least makes things normal again.

There are somethings that even combofix won't remove and have to be done manually... You are still infected..

I suggest you go through this: »Security Cleanup FAQ »Mandatory Steps Before Requesting Assistance

and then post a hijackthis log here:
»Security Cleanup

Try this then:

»forums.mcafeehelp.com/vi ··· ?t=57049