Windows 7: Random BSOD while watching video in Windows 7

Hi,
I have a HP mini 2140 Windows 7 Enterprise (RTM - MSDNAA from university) installed. It has Intel GMA 945 graphics chip. I get the drivers with Windows Update.
I have the latest drivers, double checked - on Intel and on Hp site.
I have 8 BSOD so far randomly - like one per day- while watching video with Media Player Classic Home Cinema, codec ffdshow. I watch videos like 4-5 hours/day at these week.
Event viewer says it was a 0x00000119 BSOD, google says it has sg to do with video scheduler. Any idea?

I 've been testing windows seven since 2008 oct. Yeah i'm not proud of it, but used leaked versions too, and thoose were fine too.
Thanks for your answers

Have you had issues with the codecs you have installed in the past?

Absolutely no. I used the same config (software, codecs too) from 6801 to 7600, and never had any issue, especially no BSOD. Only for now with version 7600, I've been using it from august, and i get this bsod thing totally randomly (like every day one), only when watching video.
Oh I forgot to mention, that nowadays I use more memory, (I have a 1gb) so the memory load is ~80% when whatcing video, and ~71% when not.

any idea?