Raymond Chen shares a story of how mass-purchased software for testing Windows 95 caused a little havoc at a retailer.
We've taken a few trips down memory lane this week, even enjoying nostalgic treats from Microsoft itself. For example, Apple launched its "Liquid Glass" UI design as part of an iOS 26 overhaul at WWDC 2025, and Windows fans were quick to indicate that it was almost a bootleg version of Microsoft's Aero Glass from Windows Vista in 2006.
Then, Microsoft's iconic Windows Vista boot sound from 2006 made a surprise return in the latest preview builds of Windows 11. A "bug", they say.
Now, Microsoft veteran Raymond Chen has expanded on a comical tale about a time the company's application compatibility check for Windows 95 crashed a cash register at Egghead Software's store.
But to get the full gist of the story, we have to rewind even further to 2005, when Chen discussed Windows 95's development and the importance of the operating system's app compatibility in his Old New Thing series.
Interestingly, the engineer revealed that Windows 95's lead developer headed down to Egghead Software with his pickup truck to buy one copy of every single PC program in the store ().
The lead developer dropped the PC programs he'd bought at Egghead in Microsoft's cafeteria and asked every Windows 95 team member to pick two programs that they'd run application compatibility tests on.
According to Chen:
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