"Windows Restore Virus?"

Left my Computer Idle an Came back to a blank desktop with a windows restore pop up. Task managers locked out - when i click on my start menu it shows all programs being gone, however i see my messenger and my Steam profile running on my icon bar, tried running in safe mode but just got a black screen. where should i start?...

Please visit this webpage for a tutorial on downloading and running ComboFix:

http://www.bleepingcomputer.com/combofix/how-to-use-combofix

See the area: Using ComboFix, and when done, post the log back here.