I cannot see movie thumbnails pics anymore in Win XP's explorerfolders

Hi all,

I have searched the net for a solution and found different topics but
until now my problem is unsolved.

I am using windows xp home edition with SP3 and for some reason I
cannot see movie thumbnail pictures anymore in windows explorer. It
are mainly wmv, avi and mpg files. The files are located on a cd-rom
and on my hard drive. Also, when I download a movie file from the
internet, the thumbnail pic is not visible after download. All movie
files play when I double click them. Thumbnails showed up in the past
but for some reason or another now they don't show anymore. I can't
remember what I've been installing or configuring to cause this
problem except that I recently updated the firmware of my plextor
PX-750A CD/DVD burner. So I installed the previous firmware again but
this doesn't seem to be causing the problem. I now also installed a
more recent version of k-lite codec pack standard edition but with no
difference. By the way, image thumbnails appear without any problem in
explorer. It's just with video files that I can't see the thumbnails
pictures.

Your help is very much appreciated!

Thanks,
Alex

I have found a way to resolve the issue.

If you can't see movie thumbnail pictures anymore in windows explorer,
click start, then run and type following sentence:

regsvr32 shmedia.dll

hit enter
This way my problem was solved and I hope it will work for you too.