It works just fine, and can even get the latest cumulative update for Windows 11.
Windows 11 may have system requirements which have caused controversy by ruling out even relatively modern PCs, but the OS can in fact run on a computer powered by a single-core Intel Pentium 4 (Cedar Mill) processor that’s 15-years-old. This rather startling feat was achieved by ‘Carlos SM’ who tweeted about it and then shared a video to show how the ancient system runs, as spotted by PC Mag. As you can see, the full spec of the PC comprises of an Intel Pentium 4 661 (1-core,2-thread) CPU in an Asus P5Q (LGA 775) motherboard, with 4GB of DDR2 RAM (at 800MHz) and an Nvidia GeForce GT 710 graphics card. A 120GB SSD is present for storage (with Carlos providing a CPU-Z validation of the system, too). That hardware was good enough for Carlos to install Windows 11, going the route of using a Windows 10 PE Installer, and noting that “Windows 11 is installed in MBR/Legacy Boot mode, no EFI emulation involved”.
