Service Pack and Update Center - support.microsoft.com
https://support.microsoft.com/en-us/windows/service-pack-and-update-center-92bb1064-cf3b-0b94-7c57-331f7b7db3c6
A service pack (SP) is a Windows update, often combining previously released updates, that helps make Windows more reliable. Service packs, which are provided free of charge on this page, can include security and performance improvements and support for new types of hardware.
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