If I use file-sharing software, how can I keep my computer secure?

Malicious software (malware) such as viruses, worms, and spyware can be spread through file-sharing programs. If you install a file-sharing program, your computer has a higher risk of infection. Also, many programs shared through these networks are infected with malware or are malware in disguise.

The best way to avoid malware via file-sharing programs is to not install or use them to begin with. However, if you do use them, do not install free software that you find when using them. Also, avoid downloading shared files with extensions like .exe, .com, or .bat.

Note: The University Information Security Office (UISO) recommends that you run the latest version of Symantec/Norton AntiVirus software (available to IU students, faculty, and staff for free via IUware) for your operating system, being sure to upgrade safely (see In Windows, how do I safely upgrade to the latest Symantec Endpoint or AntiVirus software?), and that you update your virus definitions daily and scan your computer weekly. For instructions, see:

• Windows: In Symantec/Norton AntiVirus for Windows, how do I schedule automatic LiveUpdates and virus scans?
• Mac OS and OS X: In Norton AntiVirus for Mac OS or Mac OS X, how do I schedule automatic LiveUpdates and virus scans?

Also see:

• On my PC, why am I having network problems after installing file-sharing software?
• In file sharing software, how can I disable outbound file sharing?
• Best practices for computer security
• What is security software?
• If I use social networking sites such as MySpace or Facebook, how can I protect my personal information?