NT 3.1

Windows NT 3.1 cannot be installed on Pentium II or newer processors. Microsoft never fixed the problem, but unofficial patches are available.

1 2 PII patch for NT3.1 and NT3.5 (maybe the same issue as for 486-with-CPUID, fixed by this source code)

from patcher9x.

win 2000 would crash when installing the components if the cpu is too fast

@wyf180, is this #4 or some other problem?

Listing here some other NT CPU patchy situations, but I think they are low priority or out of scope:

• NT4/2K (and some versions of XP) - CMPXCHG8B is optionally supported. It works on Intel/AMD/Cyrix models that have it. WinChip, Crusoe, mP6 (and other) processors support the instruction, but due to Windows NT/2K detection bug it won't be utilized with them. Same applies to other optional features.
• Vista - due to a bug it attempts to update microcode on Intel P5 CPUs, but those don't support that. Non-Intel CPUs and Intel P6 and onwards work OK
• Win7 - same bug as Vista, fixed by KB980358, which can be slipstreamed
• Win7/8.x - updates after 2017 won't install on Kaby Lake and some other processors (does that affect Virtual machines?) - there is a patch
• Win8.x - W8CPUFeaturePatch removes checks for NX, SSE2, PAE, CMPXCHG16B - but may result in problems/instability, especially if the CPU lacks of PAE (and CMPXCHG16B for x64 editions).
• Win10 - versions 1703 and later do not support Intel Clover Trail system-on-chips, per Microsoft's stated policy of only providing updates for devices during their OEM support period.[221][281]

from patcher9x.