If you have an antivirus software installed make sure it is updated first then run a full system scan. The anti-virus might not detect the virus if the program is not updated.
Some anti-virus programs will detect the virus, but will not be able to remove it. If that is the case, you can get a different program but downloading it from a non-infected computer or you can go to your local computer store and get a different one there.
Most anti virus programs will ask you to restart you computer after it is finished scanning. Once you restart you computer run another scan to make sure that the virus is gone. When you restart your computer make sure that it is still disconnected from the Internet and other networks.
The best way to combat against viruses is to be cautious of programs and files you download. Do not open any e-mail messages or attachments you do