"Disembodied" Icons in Media Player's VIDEOS display.

I have residual icons that used to refer to files that now no longer exist.
 I  got rid of the files themselves, but there are some colorful balloon icons that still refer to those departed files.
  They are uselessly cluttering up the VIDEOS display.
 How do I get rid of them?

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"A clock interrupt was not received on a secondary processor within the allocated time interval." Computer freezes randomly since upgrading to windows 7 from windows XP.

System Specs:
Operating System: Windows 7 Professional 64-bit (6.1, Build 7600) (7600.win7_gdr.100618-1621)
           Language: English (Regional Setting: English)
System...