Microsoft’s Security Update Guide lists dozens of CSC/Offline Files fixes over the past two years, but a clear, verifiable vendor entry for CVE-2026-20839 could not be located in public vendor and national vulnerability feeds at the time of writing — treat that identifier as unverified until the...
Describes how to move the client-side caching (CSC) folder to a new location in Windows Vista or later versions of Windows. Also describes how to delete the old cache folder after you move the CSC cache folder to a new location.
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Fixes an issue in which the logon or logoff process is slow when a roaming user profile and CSC are enabled. This occurs on a computer that is running Windows 7 SP1 or Windows Server 2008 R2 SP1 in a WAN environment.
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