I put a DSL modem on my machine last weekend. I found I'd gotten a trojan horse which McAfee was able to heal. However, a HideWindow command apparently came in with it which McAfee didn't do anything about. No desktop, icons, task bar, or Start button. Running Windows 2000 NT. I can get to all the programs and files through the New Task button on the Task Manager. How do I return Windows to it's normal state?