If you suspect that a virus has wound up in your computer, you should immediately do an anti-virus scan. Not only antivirus can help you with this, but also a couple of free utilities.
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Instructions
Step 1
Run a scan with your antivirus. Each antivirus program has a different name for this menu, Symantec, for example, "Scan the entire system".
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Step 2
Download one of the free antivirus utilities from the Internet: AVZ or CureIt (download links below). Run the utility, select the options you want and start scanning.
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Step 3
If no viruses were found on your computer, try step 2 again in Safe Mode. If after that the threat is not detected, then most likely you have nothing to fear, the computer is protected.