video

HI THERE PEOPLE, I M WANTING TO KNOW WHAT COULD BE WRONG WITH MY PC AS WHEN I WANT TO PLAY A VIDEO FILE IT SOMEWHAT PAUSES AND PLAYS AND PAUSES KINDA THROUGH OUT.MY PC HAS THE FOLLOWING SPECS
COMPAQ EVO DESKTOP P4 1.7 GHZ, 16MB VANTA AGP, 512 RAM, 40 GB HDD, DVDR\W.
I HAVE LOADED ALL DRIVERS FOR NVIDIA AND FRESH INSTALLED IT ALOT OF TIMES. BUT I SIMPLY CANNOT WORK OUT WHAT IS WRONG I WENT TO DRIVER AGENT. COM BUT IT SAYS MY DRIVERS ALL ARE OKI AND UP TO DATE.

I REALLY NEED TO KNOW HOW CAN I FIX THIS?SHOULD I GET ANOTHER AGP CARD OR PCI CARD TO SOLVE THIS PROBLEM OR MAYBE SOME OTHER ADVICE YOU ARE WILLING TO TELL M

ANOTHER FINK THE PROCESSOR IS ALWAYS AT 100%..