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I'm having Intel(R) Pentium(R) 4 CPU 3.00GHz Processor with 2GB RAM. While trying to install Windows 8.1 Pro 64-Bit i gave me an error saying that the processor is not compatible with Windows 8.1 Pro 64-Bit .I checked the system requirements and found that my processor doesn't support PrefetchW but all the other requirements are supported.
HTT * Hyperthreading enabled
X64 * Supports 64-bit mode
NX * Supports no-execute page protection
PAE * Supports > 32-bit physical addresses
SSE2 * Supports Streaming SIMD Extensions 2
CX16 * Supports CMPXCHG16B instruction
PREFETCHW - Supports PREFETCHW instruction
Note : '*' means it's there(supports) and '-' means it's not there(doesn't support)
I know i'm asking a poor question. But i want my old processor to run Windows 8.1 64Bit anyway. Is there any way to run Windows 8.1 64 bit without PrefetchW support?
CodeIt
Posted 2015-05-01T01:32:30.123
Reputation: 1 485
You could try to disable superfetch/prefetch ==> http://www.tomshardware.com/reviews/ssd-performance-tweak,2911-5.html
– whs – 2015-05-01T02:12:35.493@whs My processor does not support prefetchw – CodeIt – 2015-05-01T03:28:36.783
I know. That's why I suggested to set it off in the OS. However, I am not sure whether it will let you install the OS in the first place. – whs – 2015-05-01T03:59:20.897
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If it is an option http://superuser.com/questions/831394/why-do-i-get-0x0000005d-unsupported-processor-in-recent-windows-versions looking at the web the 3 items PrefetchW & LAHF/SAHF & CMPXCHG16B effects the 64bit OS versions. From what i can tell so far, the 32bit OSes do not have that problem.
– Psycogeek – 2015-05-01T04:23:19.113@whs I'll try and will give an update. – CodeIt – 2015-05-01T05:05:49.563