The easiest way to clean viruses off an infected computer is to use a free program called Malwarebytes' Anti-Malware.

Start by downloading Malwarebytes' Anti-Malware (mbam-setup.exe) and save it to you computer. Click here to download.

After you download the program you need to install it by clicking on this icon:

After your installation is complete, tell the program to update the definitions after installation and open after you click finish.

Next perform a quick scan, you can do a full scan of your computer but this scans all your drives and will take longer.

When the scan is complete (this could take anywhere from 10 minutes to 1 hour or more) click the "Show Results". Ensure that all the detected threats are checked, then click "Remove Selected".

After the threats are removed all you need to do is restart your computer, and you should be good to go.