I have a gateway 505gr desktop computer running windows xp

I have a gateway 505GR desktop computer running windows xp, am trying to upgrade to
windows 8 but BIOS doesn’t have nx,or PAE or whatever i need. how do i update bios
no luck going to gateway website.


Optional Information:
Tech Support: Devices and Peripherals
Computer OS: Windows XP
What have you tried so far?: everthing

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