Windows 7: Bad video playback quality

Hi, this is khaleel.

The problem i am facing is of video playback quality . Even the high quality video seems to be a bit blurred and distorted. Sometimes they even play as if we make their playback speed less, they just hang-up while playing. These videos play smoothly when i was using Windows Vista.

I did not have a separate graphic card. It was a build in display card named "Intel G33/G31 Express Chipset Family" whose chip type is Intel GMA 3100.

I downloaded the latest drivers also but still the problem persists.
Can anyone help me please !

The configuration of my pc is as follows:
Motherboard: Mercury PIG31T
Processor: Intel core 2 duo 2.8Ghz
Memory: 4GB 667 Mhz
Hard disk: Samsung 320 GB

What kind of Videos are you trying to play?

I found that while Win7s built in play all codec does work, the picture quality itself wasn't always so great, depending on the video/codec etc.
FFDshow or a Hardware Accelerated option looks far better, even using WMP12 or WMC.

Have you tried using something like FFDshow instead? or Shark007 Codec package

Which drivers exactly did you download - the ones from the mobo site or directly from Intel? I'd download the Graphics Media Accelerator and Chipset drivers for the G33 Express chipset straight from Intel if you haven't done so. Often times, the mobo manufacturer's lag behind recent updates, which are often crucial with new OS's like this.