I get an wdmcapi.sys error from time to time. wdmcapi.sys at address F75E46E3 based at F75DF000. I run Xp pro ona soltek board with a 900mhz thunderbird. I have a networdk card, isdn card plugged in. the sound and graphics are on-board. I have tried new drivers, one crahsed the PC and I had to reboot qwith 98 go into dos to fix it. I have re-installed XP. I can't find any conflics and I have turned off acpi in the re-install so that it is seen as a standerd pc. Any ideas?