Windows XP Home edition is a qualifying version to upgrade to Windows 8, but a lot of P4 systems are not compatible with Windows 8. Make sure you run the Windows 8 Upgrade Assistant, this will help you determine if your systems are ready or not before purchasing
To install Windows 8 on your PC, the processor (CPU) must support the following features: Physical Address Extension (PAE), NX, and SSE2. Most CPUs have support for these features, so if you receive this error, it is likely because the NX feature is not
enabled on your system.
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.
A whitepaper has been published with further details about the PAE/NX/SSE2 requirement for Windows 8, error cases and scenarios that customers encounter when machines fail to meet the requirement, and what to do to install Windows 8 on their PC’s. You can
download the whitepaper at http://msdn.microsoft.com/en-us/library/windows/hardware/hh975398.aspx.
Best, Andre Windows Insider MVP MVP-Windows and Devices for IT twitter/adacosta groovypost.com
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