I leave my computer on most of the time. All was well when I went to sleep. This morning I came in and wiggled my mouse as usual but nothing happend. The display said no video signal. Since I couldn't reboot as usual I did a hold the off button until it turned off then turned it back on. After it restarted all my desktop items were gone and no programs will open. Actually nothing will open except the task manager. Not my computer, not control panel, nothing will open, and I get no error messages. Just nothing happens. Task manager shows whatever I try to open as running but it's not visible.