GX620 requires XP or MSDOS floppy to update bios. A11 is the last version. CANNOT BE RUN FROM DOS WINDOW INSIDE WIN7 Must be run as administrator. ANTIVIRUS SOFTWARE WILL BRICK THE MACHINE IF ITS INSTALLED AND YOU TRY TO UPDATE BIOS.  iT WILL CRASH JUST AFTER IT ERASES THE BIOS AND BE DEAD AFTERWARDS. 1.44 MSDOS FLOPPY is the safest way to update this specific bios. Main reason to install A11 is updated memory timing as well as supporting pentium D 900 series and windows 10.  Pentium D 915 processor is very cheap. [URL] LAHF/SAHF and NX and CMPXCHG instructions are needed for 8.1 and 10. [URL] [URL] [URL] [URL] [URL] [URL] [URL] [URL]    
I have a GX620 and bios version is pretty old (05)  im running windows 7, i downloaded the bios update but it fails when i launch the app i have read some forums and they said I need to install the update on windows xp is that true ?  and is it worth updating or i should just leave it as it is?
GX620 bios update