One of the big problems with Virut/Vitro is that it is an aggressive file infector. And it's polymorphic. (Keeps changing its name/properties to aid in avoiding detection.)
It can infect files with many different extensions.
To top it off, it's buggy, and even if the infected files can be tracked down and the infection stopped (real tricky, as far as I know, and I believe impossible to do inside Windows) the infection leaves those files corrupted and unable to be repaired.
Very destructive.
I'd probably format and re-install the OS.
I don't think that even your .jpg files are safe to restore/back up.
