Hi Guys, I recently installed a wireless network card in my desktop and my desk top have 4 different log in names. each time I try shuting windows down on one of my log in names windows comes up with a blue screen with a message ** Hardware melfunction, call your hardware vendor for support. NMI: Parity check/memory parity error ** the system has halted**. My 3 other logging screen names dont have this problem during shut down. very strange! Sorry my system is running win xp sp2 with 3ghz processor. Appreciate any help you can provide me. Thank you.