Microsoft ends Windows XP support (April 2014)
Microsoft stopped issuing security patches for Windows XP on April 8, 2014, after 12 and a half years of support. Millions of machines in businesses, government agencies, and hospitals were still running the OS. Many organizations paid Microsoft for custom extended support agreements; others ran unsupported systems for years, accepting the security risk.
Enterprises faced expensive upgrade projects to move to Windows 7 or 8, and some critical systems — ATMs, medical devices, industrial controls — remained on XP well past the cutoff.
The XP end-of-support became the industry template for forced migrations, and it defined what 'end of support' really means: security patches stop, and the software becomes a liability.
Like Windows XP, ChromeOS is deeply embedded in institutions that planned around a published support promise. When the vendor names a cutoff, the affected organizations must spend money and time on migration whether they're ready or not.
