PC frozen on desktop

Hi, whilst my pc was on and running fine yesterday it froze on the desktop screen. The cursor would not move using the mouse and none of the keyboard prompts worked, ctrl-alt-delete or windows key etc.

Rightly or wrongly I then re-started the PC by holding down the manual start-up button on the front of the tower, this shut it down. I then pressed it again and the pc started up.
Now I have my desktop with all the icons and the cursor can be moved with the mouse, I can not however activate, move or double click any of the icons.
The system tray in the bottom right hand corner shows only the clock frozen at the time of last start up and a QuickTime icon.
I have posted on Major geeks before.
Please does anyone know what’s going on here?
D

 

This thread belongs in the Software section mate, repost there.

If you're cleared of software issues by them come back here and we'll be more than happy to help you.