My other computer has a bad virus in it. Bad. It acts as if its an anti virus?

Question:

If I try to open up the internet, it will interfere and bring it to its own site. Which tells me my computer is infected, and I have to buy the anti virus for it. If I try to do a virus scan with my REAL anti virus it says it cant scan. If I try to click on something, it will pop up and say "The operation could not be completed because (file name) is infected. Click here to activate your antivirus. then it will bring me to the page above. and then also, if I let the interent sit, it will open other random pages. Like viagra.com and Pornography sites. And I 'Believe' that it created an "Administrator' Account that I cannot delete. but I can access in safemode. I tried to do system restore but it says nothing has changed. I tried to do last known good config, but it doesnt help. Anyone know how I could get around this virus and let my virus scan scan the computer and hopefully find and delete it? Oh. also if I click to activate the software, it says "SWP2009" IDk if that helps at all. But I hope there is another way other than getting a new motherboard or something. lol

Answer:

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