[BkacTiger]

Spoiler for Problem Resolved:

Hmm, I'll give it a show later today. The computer randomly started being able to play all .mkvs ok again. However, I can't really do anything on the computer anymore while I play them; which I don't get. Since when I played all .mkv h264 videos (accept 1080) I'd be able to use multiple programs (like msn,aim,firefox,etc) all at once without the computer even trying or having any playback issues at all.

I've had this problem before with my Dell Latitude Laptop and nothing I was told to do worked until I ended up completely restarting the laptop. I could do that with this laptop too but for at least not for a long time.

I also tried reviewing actions that I made last week to see what may have caused the issue. But nothing was abnormal off of what I always do daily with my laptop. Tried deleting unncesscary TEMP files, history files and cookies still same issue. Although defraing the laptop somehow increassed the length of playback time before it'd start freezing up into slow-motion. So basically whatevers going on is completely random. Could it be a bad driver on the graphics card?

EDIT:
Something that I forgot to notice is that the computers been really sensitive lately. Even though I have at least 57~60% available memory out of 3GB and mainly under 3X% CPU usage, sometimes the laptop will choke up on me randomly; even if it is one program running. Could this be related to what may be going on with playback issues? As before the laptop would run perfectly fine as if it were still brand new except for this week...

The problem resolved itself somehow. Video and Audio playback is smooth again, only rare random occurances of the previous issues. Although the CPU is a little more sensitive now; will be re-starting the laptop to stock condition if the problem persists/comes back.