A week ago I wrote about my investigations into System Restore on Windows XP and Windows Vista. I have since heard back from a program manager at Microsoft, who said of the Vista default disk ...

System Restore is a useful tool in Windows 11/10 that allows users to restore their computers to the previous working state if any problem occurs.

Windows 11 purported to save restore points for about 90 days, but in reality, their lifespan varied.