McAfee Stinger is a standalone utility used to detect and remove specific viruses. It is not a substitute for full anti-virus protection, but a specialized tool to assist administrators and users when dealing with infected system. Stinger utilizes next-generation scan technology, including rootkit scanning, and scan performance optimizations. It detects and removes threats identified under the "Threat List" option under Advanced menu options in the Stinger application.
Virus: This is a special type of program that is able to infect itself into a computer without a users permission but requires a users intervention to spread. A Virus is a program that attaches itself to executable files and will cause an infection when a user runs the application that it was attached to. Viruses range in complexity and scope to any of the following: some that just are minor annoyances to those that are so powerful to cause physical damage to computer hardware.
When your computer needs repair, be sure that you understand what you are buying. Companies will often offer you what amounts to a service contract which may only cover the cost of diagnosing the problem and not the actual repair.