Download the file FxNetsky.exe. Once downloaded, double-click the file and follow the instructions. The file is a removal tool specifically for your virus. It should remove the virus so you wont have to reformat and do a complete reload. And yes, if you reformat you will need an installation disk.
Chris, sorry for stepping on your toes. But as an instructor in the Navy the policy was if you didn't know the answer to the student's question, find it. I still have that habit.