m1330 high-definition stuttering

I did a few searches on this topic but was surprised to not get any results. Basically, when I play a high definition video (x264, .mkv) the video occassionally stutters. It appears to happen at the same spots every time in the video(s), usually at parts where tons of particles are presents, which I'm guessing causes a strain on the computer. I don't understand what's so difficult with HD video: it's not as if the computer has to render every particle in high-def in real time, yet even so the average computer has a hard time playing them. I know the m1330 has a graphics card which is especially made to be able to play HD, so it surprises me that I'm getting this stuttering (especially since nobody else seems to be).

So what can I do? Any suggestions? It really ruins the flow of the film when you can hear what's going on but the visuals have frozen.

 

I can play HD that is more compressed than your barely legal .mkv files on a X3100 without any stutter. Proof is here (scroll down to Wanted):
http://forum.notebookreview.com/showthread.php?t=271764

Obviously you are using old, wrong and crappy player software. In the above posting a decent H.264 decoder ( CoreAVC) is mentioned. But any free ffdshow-tryouts e.g. contained in K-Lite Standard is fine:
http://www.codecguide.com/

If you want to use your GPU to decode the video - it must be encoded in compatible settings, which not every video is. In case it is the almost only free software that can decode it GPU based is MPC-HT. Guide here:
http://ranpha.wordpress.com/page-1/

In case all that doesn't work for you, go commercial:
. Corel WinDVD 9 Plus BluRay
. Arcsoft Total Media Theatre
. Cyberlink PowerDVD 8

If you install Haali Media Splitter:
http://haali.cs.msu.ru/mkv/
and in some cases rename .mkv -> .mp4 even the commercial software will recognize and play .mkv files.