This is one mystery that I am totally unable to solve. I use a Thompson Speedtouch 121g USB wireless adapter on my Compac Evo N610c notebook with Windows XP Sp2. Never had any problem until 2 days ago when I turned it on, plugged in the adapter and promptly got a BSOD. This happened everytime I tried to plug it in and if I left it in during reboot it never got past the splash screen before going blue. Even though I've disabled the automatic restart the BSOD still only lasts 2 seconds and then disappears. Although there is no error description listed the technical information section indicates: STOP: 0x000000007f which I believe is: UNEXPECTED_KERNEL_MODE_TRAP The Event ID is either 1003, which covers a multitude of sins, or ID7000 which comes from the System Control Manager and states that the Prismsvc service failed to start as acess was denied. I have made no configuration or hardware changes and have not overclocked this system; further, I know that the USB ports all work because I use other devices on them without any problem. The adapter itself works fine on another labtop so I'm really at a loss to know where to look. I also tried uninstalling and reinstalling the speedtouch driver with the latest driver update. Any help would be appreciated.