Video thumbnails not generating automaticly.

Facing a small problem with my windows vista and need help from you all guys regarding the same. I have about 40 videos in my Video Folder including .wmv, avi, flv, etc. I can t\see thumbnails of just .wmv videos are generated but not for rest of the video files. For troubleshooting purpose i downloaded and installed VirtualDubMod fix but that didn't work because the newvideos still didn't generate by themselves. I dont think this could be due to lack of Codecs because i already have installed xvid, divx, cccp, and vlc player.

Nothing helped to fix the problem. The problem is with my Vista Premium 64 bit. While at the same time i have a laptop running Vista Home 32 bit where i can see thumbnails of all these videos without any problem.

OK nevermind i figured it out somehow. The Klite codec pack i guess was what i needed to install.