need help PLZZZZ!!!

[webshanked]

ok here my problem.. a little while ago i down loaded limewire but i got a virus. now i got rid of that and deleted everything reformated my computer and every thing is just great..but one thing is wrong. i down loaded limewire again and this time whenever i download a movie or video file when i go to launch it or preview the computer screen goes black and reapears with the screen resolution set at a lower level. normal settings are at 1024 but it changes when i launch limewire to 824 or something of that sort. i have to manually go into settings to change the screen resolution back to normal. can anyone help me solve this delema. i would appreciate it very much. thanks a lot to anyone who can lend their support.