If you receive a virus warning or error message on your computer, the first thing to do is to scan your computer with an anti-virus application. Virus identification can occur in several ways: by scanning for malicious files; identifying unknown programs; or from analyzing behavior patterns associated with known viruses. If a virus is detected, make sure to remove it using your antivirus program's standard removal procedures. If the error persists, try checking for updates to your software and installing them if available. Finally, review your computer's security settings and make any necessary changes.