I came into possesion of a sony PCG-F490 laptop. It is currently running XP Pro. Specs are: 600MHz cpu, 192MB, 16Gig hd, Avaya wireless card. It is supposed to have an integrated Yamaha sound card, but that hasnt worked since i got the laptop. Iv tried windows updates, sony drivers from 98 through XP along with yamaha drivers from 98 through XP. It still doesnt work. Under device manager it shows up as Yamaha Native DS1 WDM Driver. I currently have it disabled and purchased an external USB sound card from creative. Its the Sound Blaster MP3+ model no. SB0270. It doesnt require any external power. I hooked this up and installed the drivers and it doesnt work either. I get the same windows Code 10 Device cannot start. If you look under device manager its listed under USB as USB Composite Device with a yellow explanation mark. I checked DMA support like Creative suggested and attempted to upgrade the Intel 82371 AB/EB chipset drivers, this told me XP already supported everything in the system. I have also tried wiping the HD and installing XP pro again, with no luck. If any body can help with this it would be greatly appriciated. Thanks