desktop dissappears

[b]well the problem is that my desktop dissappears every time i open any window. this started happening when a virus called security tool was downloaded on accident so now everytime i log on as owner/administrator or whatever they call it, the desktop dissappears when i open up anything.and also i have already removed security tool

Sounds like Some windows files might have been corrupted , I would try to put in your Windows disc and do a restore or repair , see if that resolves the issue, if not try creating a new account if you can via safe mode and see if the new account behaves the same way!

Are you sure that you are clean now?