IF you are on another computer, you can download other programs and move them to that computer and clean out all the bad stuff.
1. What is the make and model of the computer with the virus?
2. What version of Windows is on it?
3. Restart it and see if you can press F8 while it is starting BEFORE it gets to windows. Repeatedly tap that key when you start it and see if you get a menu that says advanced startup options. Select SAFEMODE with NETWORKING and tell me if it starts.
4. Do you have a USB drive or a cd burner and blank cd's?