Help!! Computer infected!!!?

Pay Attention if windows defender is "WINDOWS DEFENDER" not "WINDOWS SYSTEM DEFENDER" because system defender is a fake anti-virus. So download a href="http://www.malwarebytes.org/" rel="nofollow"http://www.malwarebytes.org//a and run a full scan. Delete McAfee for the poor detection, it probably missed a lot of threats. download the best free anti-virus available a href="http://www.avast.com/" rel="nofollow"http://www.avast.com//a for the best free security.