Dell OptiPlex 380 Blue Screen of Death (BSOD): Hardware malfunction Call your hardware vendor for support NMI: Parity Check / Memory Parity Error The system has halted I couldn't figure it out for the life of me. After reinstalling Windows 7 Pro 32bit, everything was working fine until I tried installing the Broadcom eXtreme Gigabit Ethernet driver. As soon as it started installing, the error started coming up on a fresh install of Win7. So, as hard is it is to believe... the NMI Parity Check / Memory Parity Error was coming up on the Dell OptiPlex 380 due to the Broadcom Ethernet card. So, after a quick visit to an electronics store to purchase a PCI Ethernet card, the issue was resolved. I never reinstalled the drivers for the Broadcom and it stayed as an unknown device in Device Manager. It's a small price to pay so long as the error doesn't keep coming back. I hope this helps someone else... I know that it bothered me so much that I was about to rip my hair out because of this reoccuring issue. Good luck!