Computer Problem. PCG-FRV25. Anyone own one?

I own a PCG-FRV25 SONY VAIO, the most useless computer. Well, I think so. Anyways, do you guys know anything about the computer, it's problems and solutions? The graphics card is really weird as you can lower your RAM (512MB) to increase your Video memory (Max 128MB) The combo drive. DVD/writer 24X whines like anything when you put in a little bit scratched cd into it. Burns CDs like nothing...(I've posted about that before here) And Crashes on me whenever I install Service Pack 2. Do you guys know anything about it? Also what are the warranty dates for Laptops? What should I do? Thank you all afterdawn members for your help!