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Microsoft Confirms Windows 11 Bug That Locks Users Out of the C: Drive (windowsreport.com)
submitted 6 months ago by throws_lemy@reddthat.com to c/technology@lemmy.world
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KB5077181 was released about a month ago as part of the February Patch Tuesday rollout. When the update first arrived, users reported a wide range of problems, including boot loops, login errors, and installation issues.

Microsoft has now acknowledged another problem linked to the same update. Some affected users see the message “C:\ is not accessible – Access denied” when trying to open the system drive.

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[-] FauxLiving@lemmy.world 1 points 6 months ago

That is certainly true and may very well be the case here.

It could also be the case that a human developer forgot to bounds check an array and iterated out of bounds, corrupting some important kernel variable. We won't know unless we get a postmortem.

this post was submitted on 14 Mar 2026
647 points (98.5% liked)

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