Help - media player

I swear when I first got vista installed, I installed a codec package and I was able to watch streaming AVI files. In old XP you had to download the entire file before it would start playing. NOW vista has stopped doing it, and I don't know what I have done and at this point I'm beginning to think I am crazy.

I was able to view avi video files while downloading. I could click anywhere on the video line and it would fast forward and backward to the point in the timeline where I clicked - of course with a delay, but with the ability to view while downloading and forward and backward while downloading.

NOW that is all gone. Even with WMV files, it will only play as far as it has streamed and it will not allow any forward or backward movement on the time line until the entire file has been downloaded. With Avi files - you can't see anything until the entire file is downloaded.

Any thoughts.?

 

Well from what I know you can only do this with certain sites and players depending how fast it loads or if the player\site allows streaming or not.
From my research it could be the video card did you reinstall it or install a new 1 recently or even messed with video settings lately?