One in particular is the w32blaster worm. You can read about it on many anti-virus sites. For example, this article describes the worm and tells how to get rid of it. If you are not running up-to-date antivirus and not running a firewall when accessing the Internet, you will continue to have problems.
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.