Microsoft CTO confesses that 30-year-old code from the mid-90s still forms the bedrock of Windows 11 — ancient Win32 API still the backbone, but CTO says it’s ‘more relevant than ever in 2026’

A top Microsoft exec has admitted that Windows 11 still relies on a bunch of old code from the 1990s. It is refreshing for Microsoft Azure Chief Technical Officer Mark Russinovich to highlight this fact on social media, but it might not surprise as many folks as he thinks.

As Russinovich eloquently puts it, those of us invested in the computer scene in the 90s “were thinking flying cars and moon stations by the year 2026, not Win32.” The admission that such old software tech is still the “bedrock” of Windows today may be the CTO strategically sharing a cold, hard truth, providing a ‘let’s be real’ moment as part of Microsoft’s latest charm offensive. Sharing…