Seabass

Hello I am running Windows XP on my PC. A couple of days ago i received a pop up on extra torrent about updating software which I closed. Since then I have been unable to open malwarebytes and mcafee. Now my PC also appears to restart when I open internet explorer. I have also noticed that white colours are streaked with blue. I have tried to open malwarebytes in safe mode but to no avail. Could someone please advise. I am rather desperate. Many thanks in advance for any suggestions. Pierre