If you can identify the infection,
http://www.sarc.com has lots of effective removal tools and instructions, though dealing with virus aliases can be a real pain. For some reason all the AV companies insist on calling the same thing by different names.
Also, for screen captures (if I read the original post right), all you need is the CTRL-PRINTSCRN key combo, then paste into any image editing application you like. Don't know why anyone would use anything else. Unless you're trying to make a video...