Sxsi X64 Windows 10 Updated -

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Side-by-side assembly sharing enables multiple versions of COM or Windows assemblies to run at the same time. Microsoft Learn What are Side-by-side Assemblies? - Stack Overflow sxsi x64 windows 10 updated

: Users who have subscribed to the ESU program will continue to see "x64-based system" updates until October 2026. With the advent of and modern Windows 10

With the advent of and modern Windows 10 updates, Microsoft solidified the WinSxS folder (located in C:\Windows\WinSxS ) as the definitive solution. Instead of a single copy of a DLL, WinSxS stores multiple versions and variants (x86, x64, debug, retail) of the same system library side-by-side. The (CBS) is responsible for:

For 32-bit applications running on x64 (via WoW64), Windows also maintains:

Every Windows 10 update (monthly rollups, feature updates like 22H2, or security patches) touches the SxS folder. The (CBS) is responsible for: