Win Vista Video Playing Problem

Hello Im new member of this site,

I have Vista ultimate edition,Windows XP and following hardwares

2.0 GHz Pentium 4 CPU
1 Gb of system memory
ATI 9550 VGA Card

My problem is when i play video in VIsta( WMP11,Cyberlink Power DVD and most of the Video Players ), CPU Speed going 100%.cant do any other work.but video playing normaly.if i drag the player its like a video play on windows XP without VGA Driver.on windows XP no problem its working properly. if you have a idea please post.


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