Usually "god knows what" leads to a virus, i'd bet that's your issue. Post up in the malware section...
Can you bring up the task manager? ctrl - alt - del, if you can, find explorer.exe and kill any/all instances. In task manager, click on file - new task (run) - type explorer and hit ok. That may bring your desktop back.
Can you bring up the task manager? ctrl - alt - del, if you can, find explorer.exe and kill any/all instances. In task manager, click on file - new task (run) - type explorer and hit ok. That may bring your desktop back.