HardWare Malfunction

After setting up a Gateway zx6800-03 all-in-one I began receiving the following: A blue screen with the message "Hardware Malfunction Call your harware vendor for support NMI: ParityCheck/Memory Parity Error ***the system has halted***" Machine is continually on and allowed to go into sleep mode. Blue screen even came on when I attempted to plug in usb flash drives and an mp3 player. It also comes on when sitting idle.

Support attempts by phone could not resolve issue. Sent the machine to support and two memory modules were replaced and machine booted to windows 7 without problem. PC returned to me and continues to generate the same blue screen hardware malfunction message.

Even after windows was upgraded to windows 7 ultimate, office 2007 ultimate I continue to receive the same blue screen message.

System has Intel Core 2 quad Q8200S 2.33GHz processor
4mb L2 cache, 1333MHz front side bus
8GB DDR3 dual-channel 1333MHz RAM
1TB Green SATA Hard drive
23" Full HD Widescreen Ultrabright LCD 1920x1080 (integrated windows 7 compliant multi-touch screen)
Built-in web cam and microphone Intel Graphics Media Accelerator X4500HD
Built-in Hybrid (ATSC/NTSC) TV Tuner
8x SuperMulti DL DVD+-R/RW Drive
802.11b/g/Draft-N Wi-Fi CERTYIFIED
10/100/1000 GB Ethernet LAN
and more...

Any one else experiencing this blue screen message?