Symantec Antivirus Research Center 
The Symantec Antivirus Research Center offers a wealth of information on viruses. It begins with a list of hot topics (new virus and virus products), and also provides links to virus alerts, an information database, references, submit virus samples, Macintosh viruses, and Symantec virus product information.

Symantec Technology Web Site
The official Web site for Symantec Corp.

Webopedia Quick Reference: Common Windows PC Issues
Tips to Diagnose and fix a slow running computer.

Webopedia's "Did You Know...?" Section
Use this Webopedia knowledge section for an in-depth overview of specific technologies and occurrences in the areas of Computer Science, The Internet, and Computer Hardware and Software.

Webopedia's "Did You Know?" Article
The Difference Between a Virus, Worm and Trojan Horse.

Webopedia's Quick Reference Section
Use this Webopedia reference section for information on common Internet and computer facts and occurrences.