Windows 11 has been tested on a Lenovo ThinkPad X220, revealing it to perform poorly compared to its predecessors, particularly Windows 8.1, which excelled in benchmarks for boot times and application launches. The test involved various Windows versions (XP, Vista, 7, 8.1, 10, and 11) on the same aging hardware, highlighting that Windows 11 consistently finished last in most categories. The ThinkPad X220 does not meet Windows 11’s minimum requirements, lacking essential components like TPM 2.0 and a compatible processor, which may have skewed the results. Critics argue that using outdated hardware for testing is not representative, suggesting that a fair comparison would involve flagship devices from each generation. Windows 11's architecture is designed for modern multicore CPUs and SSDs, which may struggle on older hardware. Additionally, Windows 11 has heavier overheads due to advanced security features, which consume resources that older operating systems do not. User feedback indicates frustration with Windows 11's performance on legacy hardware compared to leaner alternatives like Linux. Despite Microsoft promoting optimizations in Windows 11, these did not manifest in the ThinkPad test, and the findings raise concerns for businesses considering upgrades as Windows 10 approaches its end-of-support date in 2025.