When installing Windows 8 it is possible that you receive the following error:
Your PC’s CPU isn’t compatible with Windows 8.
Solution: For Windows 8 tor run the CPU needs to support Physical Address Extension (PAE), NX, and SSE2. Most modern CPUs have these features, but it is possible this is not enabled in your systems’ BIOS.
You can access your systems’ BIOS by pressing Del, F2 or another key right after starting your computer. See your systems’ documentation for more information about entering your BIOS.
When you are able to enter your BIOS, look for the ‘NX support’ option and enable it. It can also be called Virtualisation Support’
Save the settings and reboot the computer, when you retry the installation, the error message should be gone.
According to Steven S. on the Microsoft answer forum:
To resolve this error, follow manufacturer guidelines to enable NX (“No eXecute bit”), or the equivalent XD (“eXecute Disabled”), feature within the BIOS settings. This feature is typically found in the Advanced or Security tabs within the BIOS settings, and can be referred to by a variety of names, including but not limited to:
· No Execute Memory Protect
· Execute Disabled Memory Protection
· EDB (Execute Disabled Bit)
· EVP (Enhanced Virus Protection)
If the BIOS setting for the NX (XD, EDB, or EVP) support option is not available on your system, you may need to contact the manufacturer to update the BIOS. Note that some very old processors may not contain these features and will be incompatible with Windows 8 Release Candidate.
There is a Microsoft whitepaper available describing the processor requirements for Windows 8.
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