The Pentium 4 is an extreme example, and I admit I used it quite dishonestly to over-emphasise the fact that Windows 11 runs on CPUs that it claims not to suppo

The Pentium 4 is an extreme example, and I admit I used it quite dishonestly to over-emphasise the fact that Windows 11 runs on CPUs that it claims not to support. A 7th or 6th gen Intel would run Windows 11 quite well, unlike a Pentium 4 which struggles a great deal with it. Despite that, without workarounds, you cannot install Win 11 on one of these CPUs. You must have an 8th gen or later.