I recently threw together a computer using some parts from my old one and some new. I used a Chaintech SPT800 motherboard with a P4 2.8 , Seagate Barracuda 7200 rpm 120 gig hardrive, Samsung Dvd-rom sd-616E, Teac DVD+RW DV-W58E, windows xp pro. When I turned it on everything seemed fine, windows xp installed just fine. As I began to use it more I started to notice that my usb didn't work right. Using a usb mouse it would just turn off and I would have to reboot to make it work again. I got a ps2 adapter and that works ok for now but if I use anything else with the usb like my mp3 player it will just stop working. Then I went to burn a cd and it copied extremely slow like at 1/4 of its total speed. When I try to burn a dvd it just gives me a error after about 2 minutes into the copy. I went and checked in the properties and they are stuck in pio mode even though the use DMA if available is selected. Any compressed file i download off the internet becomes corrupt no matter what. I can download it and use it right then and it works but if I leave it for say 20 minutes and come back it will be corrupt. I am basically at a loss. I have ran the hardrive test from seagate and all the test say its working perfect. I have read up on some of the issues and tried what they suggest to fix the problem and honestly nothing seems to work.