How much memory do you have? More memory could help depending on how much you already have. With Windows XP I suggest a minimum of 1 GB of memory. HAve you tried removing unused programs and defragging your hard drive?
Thanks for the prompt reply Jim. I'm actually running 3Ghz of RAM which is the only upgrade done. It did make a difference but trying to watch videos on one monitor while working on the other has become choppy.
Not a bad little system, fastest cpu that the motherboard Nvidia GeForce 6150LE will handle with a bios upgrade (do it before you swap chips) is the Athlon X2 6000 and 4GB 800Mhz DDR2 ram is the max. PSU is rated at 305watts.
Due to the position of heatsink, if you plan to upgrade video system a single slot card is needed and one of the low power ATI 5450 would work well without a psu upgrade
You should be able to get all of them off eBay cheap, should be ok for streaming video.