IBM ThinkPad T43 enthusiast installs 'almost' every version of Windows on the single-core laptop without using virtual machine — 26 years of Windows running bare metal, from 1996 Windows NT 4.0 to Windows 10 22H2 working on legendary hardware

A Reddit user successfully installs almost every version of Windows, from NT 4.0 to Windows 10 22H2, on an IBM ThinkPad T43 without using virtual machines. The laptop, known for its legendary hardware, runs these operating systems directly on the single-core Pentium M CPU. The user showcases screenshots of various Windows versions running on the device, highlighting the evolution of the Windows UI over the years. Despite some challenges with drivers and hardware support, the user manages to dual-boot and upgrade through different Windows versions, ultimately settling on a trio of older OSes for preference. The ThinkPad T43, with its durable build and quality keyboard, continues to impress retro tech enthusiasts with its ability to handle a wide range of Windows operating systems.