How do you remove a computer virus?

This answer deals with windows systems as Linux and Mac OS machines are less likely to get viruses and offer few if any solutions to these viruses.

Step 1. Install one of the programs from the first bulleted list towards the bottom. For which ever you choose visit the download site (See related links) and follow the downloading and installation instructions.

Step 2. Once the program is installed, update the program and then run a "Full Scan" or it's equivalent of your computer to attempt to detect any malicious activity.

Step 3. Follow the instructions given by the application to remove the malicious application(s).

Step 4. Install a program from the second bulleted list below. These are antivirus programs that actively protect your computer from viruses (See the related links).

Step 5. Again install any updates for the antivirus program, and run a scan from the antivirus program again a "full scan" or its equivalent.

Step 6. Follow the instructions given by the application to remove the malicious application(s).