I scan my computer for viruse and have some , iwould like to clear everything up. i dont have a credit card is there any way to do this free

Are you sure your computer actually has one or more viruses? You may be a victim of one of the fake antivirus programs that can get into your computer. These pop up windows showing scan results that tell you all sorts of viruses have been found, but they're all completely bogus. The only real trouble is the program itself. Usually it becomes difficult to use the computer because the program keeps nagging you, or it refuses to let other programs run because they are "infected".

Malwarebytes' Anti-Malware is a good tool to start with. Download and install the free version. When you run the program, have it check for updates and then run a quick scan. It's a very effective program even in its free version and I use it frequently to get rid of nasty stuff on client machines. You can also install the latest version of one of the free anti-virus programs (Avast!, AVG or Avira) and scan your computer. Sometimes a new version or different program can find and eliminate something another program missed.

You can also find many removal tools for specific viruses if you need them. Bleepingcomputer.com is a good site with many tools and helpful information for getting rid of viruses.