I upgraded to XP from 98 a few weeks back and all was good.. But suddenly I have started getting a problem with 'video' playback. After I switch on or reboot the PC, everything works fine.. But, when i first run ANY kind of video the application locks up, but XP still runs normally. At first I thought that it had completely locked, as the application would go into a 'Not Responding' state and I couldn't shut it down. However, one day, I left it.. And it finally responded and the video played.. Then I closed the application normally.. After this, videos will run INSTANTLY and all works normally until I reboot. After this, the problem returns. If I play AVI, DVD, MPEG etc using Media Player, Power DVD, etc (Basically ANY video under ANY application) the application will freeze from anything from 1 to 10 mins. But, as I said before, after its finished what ever it doing, everything is back to normal again. I have tried EVERYTHING.. I removed applications, removed hardware, upgraded drivers, but nothing I can do can get it back to 'normal' again. Its not a major problem, as I now run a video when i first boot my PC, wait for it to respond and then carry on.. But i would like to know whats causing this. As I am doing a lot of video editing and MPEG work, this is a real pain and I would love to fix it. Does anyone have ANY ideas where to start??