I only have background pic showing and right click does nothing. I do have movement in curser. Desktop typed in at "run" takes me to "Open With". I also have tried to run new tasks such as notepad and I get denied access. The "shut Down tab will shut down windows.
1 - Try a Windows System restore to date when it worked correctly.
2- With Windows CD do a Repair-Install.
3 - Infected ? - Run AV and Malware Scans