SP2 I can't use thumbnails

Microsoft Windows XP

Since i've put on SP2, When I open any folder with Video Files that have
the Thumbnail previews my computer Hangs and I have to Press Ctrl Alt Del to
close down the folder. I managed to revert to the Tile View using Explorer,
but has anyone else had this problem ?

Known issue with .AVI files.

Preventing AVI previews in Windows Explorer - Tweaks @ Sanx:

If you wish to turn off video thumbnails / preview for all other video
filetypes, type this from Start/Run

regsvr32 /u shmedia.dll