I have a lot of video clips of many types (mpeg,mpg,avi,divx) in folders that I have set the wiewing options as thumbnails just for the fun of it. At first, all of them were the thumbnails as it should be displayed until I installed Xing Mpeg Player. All the clips's thumbnails were changed with Xing's icons. After uninstalling Xing, all the movie files with the extensions Mpeg and mpg were displayed as Windows Media Player file icon instead of the thumbnails it should be shown. I tried reassociating the extensions with the proper players but still the thumbnails couldn't be restored. All the other files with .avi .divx extensions were displayed as thumbnails but the mpegs were not. The only solution I know for this problem is reinstalling Windows which I really did a lot of times until I even managed to memorize the cd key! Thanks for answering a question asked by a pure noob compared to all experts out there. Hope that I get multiple ways to solve this problem wether it be registry fix, software, misc. And oh man, I just registered and I don't have a lot of points :P Peace.