Windows 8 Installation fails, computer is COMPLETELY supported


New Member
Jul 3, 2012
Hello everyone,

I was trying to install the Win8 RP/Beta or whatever its called, and the .exe version says that my CPU is not supported, and using the .ISO inside of VirtualBox or VMWare results in the "Windows" text popping up, then after about five minutes, I get:

Your PC needs to restart.
Please hold down the power button.
Error Code: 0x0000005D

That came out of VirtualBox, where I did not attach a virtual hard drive (I have tried it with/without attaching, same result), PAE/NX is enabled on my system (and I enabled it inside the VM), although no hardware acceleration is available. I am running on intel Pentium Dual-Core T4400 @ 2.2 GHz, with 3 GB RAM. (Please refer to my profile for more hardware info). Does anyone know why the installer .ISO won't start on my system?


Senior Member
Sep 20, 2011
This is definitely a Bios issue. You need to enable NX (sometimes called XD or Execute Disable Bit) in the
computers BIOS menu. If it's disabled you wont be able to install Win 8.

You can enter the BIOS the moment you turn the PC on, usually by pressing Delete or F2, but it often displays what key to press.

If it's not in the BIOS you need to update the BIOS, and hopefully it will add this

Almost all CPU's within the last 7 years will support PAE, NX and SSE2.

Be advised that flashing a Bios is not for the faint of heart. It is definitely not without risk. You can turn your PC into an attractive paper weight. This might be best left to a PC tech.
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