Video Display Slowdown

So I just started using my old laptop after about a year and a half of dormancy. When watching videos online or pre-loaded videos on Itunes or whatever sometimes the display will stutter significantly especially when there is a high volume of movement on the screen. When I first got the laptop (late 2005) it had no problems playing video. Someone partitioned my C drive into two sections making half of my stuff in drive C and half of my stuff in drive D. Drive C is almost completely full and drive D has space so I could reallocate some files. Anyway, curious if this overload of drive C could be causing the slowdown or if it is something else. Any suggestions on how I can make my computer play back video at the rate it used to? Any help would be much appreciated

If the partition with windows on it is the one that is almost full you maybe should try to clean it up some. Use the other partition to store all your files if possible. I'm honestly not sure if it will help your video but I do know that it should help your computer run a little better because you would be increasing its memory a little. Hope that helps some >.<"