By now we know, the minimum requirements for install Windows 11 are quite limiting: officially, Microsoft's new operating system not only requires TPM 2.0, but is only compatible with eighth generation Intel Core CPUs and second or later generation AMD Ryzen CPUs. The company later extended compatibility to XNUMXth generation Intel Core processors, but only to include devices such as the Surface Studio among the products eligible for the update.
The easiest way to check if your PC is compatible with Windows 11 is to use the program PC Health Check, which eventually will indicate what are the reasons why you cannot install the new operating system, at least officially. In case of incompatibility, in fact, the software warns you that you will not be able to upgrade to Windows 11, indicating with a yellow dot which components of your PC do not meet the requirements.
Although Microsoft's minimum requirements are quite stringent, there are many testimonials from users who, after trying to install Windows 11 on unsupported PCs, found themselves with a fully functional system and able to receive updates via Windows Update, on the contrary as initially stated by Microsoft. There are even those who have tried to running Windows 11 on a 2007 CPU, with perhaps unexpected results.
The YouTube channel "Carlos SM Computers" recently uploaded a very curious video: running PC Health Check on a computer running Pentium 4 661 (processor with a single core at 3,6GHz), the CPU is listed as compatible with Windows 11. But it does not end there: by bypassing the checks on TPM 2.0 and secure boot (here we explain how to do it), it is actually possible to install the new Windows, run it and even receive updates. The system is certainly not among the fastest around, but as you can see from the video below, everything works perfectly.
The most likely hypothesis is that Microsoft has not included such old processors in the PC Health Check database and that the app, not finding the CPU in the list of unsupported processors, automatically indicates it as compatible with Windows 11. Probably Microsoft will update the app to also include this Intel CPU family.