Thumbnails not working in windows 7 and windows 7 RC

Question

When I used to view my security camera video card in Vista I would get a thumbnail view of each 10 second video produced.. This made it easy to skip through each video produced and pick out the ones that I thought would be best to check. This would be watched after about a week or so of videos. Now in Windows 7 and windows 7 RC I cannot seem to find this thumbnail view. All I can see is the media player film type .AVI icon for each video. Is there any way of turning the thumbnail function back on. I have tried all the registry fix changes that have been suggested and they don't work. I have downloaded different codec programs and they don't work. The icon/thumbnail box is unchecked in folder views and that doesn't work. Is there an answer to my problem. Does any one know if Microsoft are working on a change to get thumbnails to work with .AVI files. Hope you can help.

Answer 1

Hi guys,
I found a solution for this issue on windows 7 64 bits !
I'm on the 7100 I couldn't get thumbnail preview for my .MOV or .mp4 files. Sometime I could get one or 2 thumb out of 30 in the folder.
I changed and added a few key to the registry to fix this preview thing:
IN REGEDIT:
_ HKEY_CLASSES_ROOT\.mov\shellex\
where I only had 2 key inside the shellex.
_I looked inside the mpeg shellex ( because mpeg would generate good thumbnails:
HKEY_CLASSES_ROOT\.mov\shellex\
where it had 3 keys
_SO what I tried was to copy those 3 key and replace my .mov shellex 3 key with those.
this is what you can do:
-open regedit
-right click on:   HKEY_CLASSES_ROOT\.mov\shellex\
then export it ( it will be your backup in case it doesn't work or you mess up something you will just have to click on it to instal it again.
Then, 
- remove the "HKEY_CLASSES_ROOT\.mov\shellex\ "KEY
-open notepad
-paste the following in your notepad file:
-----------------------don't paste this line-------------------------
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\.mov\shellex]
[HKEY_CLASSES_ROOT\.mov\shellex\{3D1975AF-0FC3-463d-8965-4DC6B5A840F4}]
@=""
[HKEY_CLASSES_ROOT\.mov\shellex\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{c5a40261-cd64-4ccf-84cb-c394da41d590}"
[HKEY_CLASSES_ROOT\.mov\shellex\{E357FCCD-A995-4576-B01F-234630154E96}]
@="{9DBD2C50-62AD-11D0-B806-00C04FD706EC}"
-----------------------don't paste this line-------------------------
-save it under whatevername.reg ( be sure to use "all file" kind of type file.)
-double click on the reg file you just saves you just saved , it will reinstal the shellex inside the .mov key here:
HKEY_CLASSES_ROOT\.mov
with the right keys and stuff.
-close regedit
-open a folder containing your .MOV, refresh the files several times to be sure, it should be working.