Is your computer acting funny? Are you worried that you may have visited a malicious Web site or opened an e-mail attachment with malware?

Instead of worrying about it you can now go to a new Web site McAfee is launching on Tuesday that is designed to help computer users figure out if they have legitimate reason to be concerned.

The new Cybercrime Response Unit offers a forensic scanning tool that checks for malware on the computer and cookies left by suspicious Web sites to help deter...