Turn on a PC running Microsoft Windows 8.1 and you’re likely to be greeted with a full-screen message warning that the operating system will no longer be supported after 10 January 2023, and – critically – will no longer be receiving any security updates. Microsoft sneaked into the latest update rolled out to Windows 8.1 users this week a program (EOSnotify.exe) that displayed the end-of-support notification.

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