If your computer is not protected, identity thieves and other fraudsters may be able to get access and steal your personal information. Spammers could use your computer as a zombie drone to send spam that looks like it came from you.nti-virus software protects your computer from viruses that can destroy your data, slow down or crash your computer, or allow spammers to send email through your account. Anti-virus protection scans your computer and your incoming email for viruses, and then deletes them.