Disk Drive And Floppy

[-Trip-]

Hello,

After my pc has been on a wile my disk drive doesnt show in my computer and if i stick a disk in auto run doesnt open.
And for some reason device manager shows a floppy disk when i havent got one at all :s

If i turn my pc off and wait about 20m and boot it up the disk drive works for a wile.

Any ideas?