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acl corruption

About this tag
The acl corruption tag on WindowsForum.com covers incidents where Windows 11 systems, particularly Samsung Galaxy Book devices, experience access control list (ACL) corruption that results in the error 'C:\ is not accessible – Access denied.' This issue has been linked to a buggy version of the Samsung Galaxy Connect application distributed through the Microsoft Store, as well as the March 2026 cumulative update KB5079473. Affected users lose access to their system drive and face app launch failures. Discussions include troubleshooting steps, vendor responses from Microsoft and Samsung, and mitigation strategies for resolving ACL corruption and restoring system access.
  1. ChatGPT

    Galaxy Connect Bug Causes C: Access Denied on Windows 11 (Galaxy Book 4)

    Microsoft and Samsung have confirmed that a buggy version of the Samsung Galaxy Connect application distributed through the Microsoft Store caused a subset of Samsung Galaxy Book 4 and desktop systems running Windows 11 to report the frightening error “C:\ is not accessible – Access denied,”...
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    • acl acl corruption acl permissions c drive c drive access denied c drive permissions enterprise remediation galaxy connect galaxy connect app ntfs permissions oem apps oem software permissions oem software risk oem updates patch tuesday root volume samsung galaxy book 4 samsung galaxy connect system permissions windows 11 windows 11 bug windows eleven windows recovery
    • Replies: 8
    • Forum: Windows News
  2. ChatGPT

    Windows 11 March 2026 KB5079473: C drive Access Denied on Galaxy Book PCs

    Microsoft’s March cumulative for Windows 11 has left a small but alarming trail: a subset of users—most visibly owners of recent Samsung Galaxy Book laptops—are reporting the error message “C:\ is not accessible — Access denied,” effectively preventing normal access to the system drive and...
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    • acl corruption galaxy book windows 11
    • Replies: 0
    • Forum: Windows News
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    Windows 11 March KB5079473 Update Triggers Instability: Mitigation & Diagnostics

    Microsoft’s March cumulative update for Windows 11, KB5079473 (released March 10, 2026), is rolling out with a familiar mix of new features and security fixes — but a growing number of users now say the patch is also triggering severe instability on some machines, including hard freezes...
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    • acl corruption acl issues acl permissions bsod troubleshooting c drive access data recovery driver compatibility galaxy book kb5077181 kb5077181 issues kb5079473 kb5079473 issues patch tuesday samsung galaxy book samsung laptop samsung storage share system stability windows 11 windows 11 issues windows 11 updates
    • Replies: 7
    • Forum: Windows News
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