Everything is perfect-- but it stutters so badly.

[Grawly]

ohey
I checked out the page on the most common settings for getting games to work, and Melee is working at a very fast frame rate.
However, my only problem is that the game randomly stutters every 5 seconds. The video freezes for about a half second and so does the audio.
What should I do in order to get rid of this problem?

aaand my specs. I don't know as much as I should in this area so ask me to correct it if I write something wrong:

Intel i5
8GM RAM
ATI Mobility Radeon HD (4500/5100 Series)
Windows 7 Ultimate x64

Thanks : D