my laptop computer is acer aspire 3620, i just upgrade from windows xp to windows 7.
after upgrading i stared to hear like "scratching noise" and the blues screen appears it says
"NMI : parity check/Memory parity erro
*** the system has halted***
and i restart it again and its seems normal and main while i try to install app... the problem appeared again and again.
Go to BIOS - Advanced - Bus Options - Disable PCI SERR# Number