Win 8 requires PAE/NX/SSE2 instruction support

Computer Store News: In Windows 8 system requirements, the processor must support PAE, NX and SSE2. what are they? Why do computers need to support them in order to run Windows 8?

Physical Address Extension (PAE), NX bit processor (NX) and Streaming SIMD Extensions instruction set 2 (SSE2) a functional processor: - PAE supports 32-bit processor may access 4GB The above physical memory features a version of Windows, and it is a prerequisite for NX. - NX allows the processor to help protect your computer from malware. - SSE2 (a long-standing standard for processors) is a set of instructions used by more and more third-party applications and drivers. For Windows 8, to get the malware defenses working, your processor needs to support NX. To enhance the reliability of third-party applications and drivers running in Windows 8, SSE2 is also required. If your computer does not support PAE, NX and SSE2, you will not be able to install Windows 8. If your processor does not support PAE and SSE2, the Upgrade Assistant will provide you with an error message. You will also receive a notification if the processor does not support NX or if NX in the computer BIOS is turned off. Windows 8 installation will attempt to enable NX during installation, and if NX is not enabled, your computer will be restored to the current operating system.