I am running Vista Ultimate with all updates on a Toshiba Satellite 1900. It has the latest BIOS and 1GB of ram. My Linksys G card works fine but when I plug in the DW642 card it will let me Cruz the internet for a few minutes than all freezes. It will freeze and release from time to time but it drives me crazy. I pull the card and all is fine. I have downloaded all the latest drivers and installed as instructed on the support website and still no luck. I think it maybe a IRQ issue/conflict. Any ideas on how to fix or make it work?