I'm still having the same problems playing movies on WMP9 despite uninstalling and reinstalling the player. So, any help is still needed.
I have fixed the .jpg image preview in windows explorer though. I'll post the method I used to replace the key for anyone else that has the same trouble, but first I'd just like to make a big warning:
DISCLAIMER: Before making ANY changes to the registry it's in your best interests to make a back-up of the registry, as sometimes changes can serious problems, ie: prevent windows from running.
Choose Start, Run, type regedit, and press Enter to launch the Registry Editor. Click the plus sign (+) next to the HKEY_CLASSES_ROOT folder icon, or double-click the icon itself. From there, navigate to the folder (called a key in Registry lingo) corresponding to the extension of the file type that Explorer is not previewing properly. For example, to fix the preview information for .jpg files, go to the .jpg key. If it has a plus sign next to it, click that to expand the tree diagram for the complete .jpg key. There you'll find a key called ShellEx. (If you don't see it, no problem: Just right-click the .jpg icon in the left pane and choose New, Key. Then type ShellEx and press Enter.)
Click the plus sign next to the ShellEx key to expand the keys underneath. There should be a key named {BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}. If it's not there, take a deep breath, right-click the ShellEx key in the left pane, and choose New, Key. Then type {BB2E617C-0920-11d1-9A0B-00C04FC2D6C1} and press Enter. (You can now exhale.)
Select the key to see its contents in the right pane. It should include an icon labeled (Default) and, to the right, a series of numbers in braces. If it doesn't, and you created the key yourself, double-click the (Default) icon in the right pane to edit its value data. If the key was already there but has the wrong value, right-click in the right pane and choose New, String Value. Type (Default) and press Enter. Double-click the (Default) icon to edit its value data. Then in the Value data box, type {7376D660-C583-11d0-A3A5-00C04FD706EC} (including the braces) and click OK.
Finally, proofread your typing, both for the new key and for the string value. If you did everything right, your preview should return whenever you select a .jpg file in any Explorer or folder window that is set to view Web content.
Of course, this example fixes only the .jpg file type. You need to repeat the procedure for the .gif key and any other key that refuses to show a preview. The method outlined above won't work for every file type, but you should be able to preview images having any of the following extensions: .art, .bmp, .dib, .gif, .jfif, .jpe, .jpeg, .jpg, .png, and .wmf. Have fun!
http://www.pcworld.c...id,36585,00.asp[edit: contents quoted in case link's broken]
Edited by Caine, 15 May 2005 - 06:54 PM.