It's not just a scamware, it is a virus. It will hide itself and it will try to prevent you from deleting it, usually by replacing the executable file with itself, so any time you run an EXE it goes through this nasty bugger instead. You can remove it safely with a little internet searching. Unfortunately you'll need to find what it has named itself. This bugger has come up on my sistsers' computers many times and I have had to fix them. It involves finding which running EXE is the nasty one, locating it on your HD, finding the registry entries it has screwed over, including those for MSIE and Firefox, and fixing the registry entries before you permanently delete the EXE in question.
That's a really short description of the process. If you can get your task manager open before the virus loads on bootup you should be able to scroll through the process list and locate it.
Just disconnect it from any network before you do. I don't know if it replicates across your network or "calls out" any info. It is a virus, after all!
