It's a rogue security application. Download Malwarebytes (MBAM) and run a quick scan. It should get rid of the rogue pretty easily. If you have problems getting to the Malwarebytes homepage, you might have to go into safemode and download MBAM. You can also install MBAM in safemode and have it conduct a quick scan. I would also run one in regular mode. Remember to tap f8 when the computer boots up and go into safemode with networking to have access to the Internet.