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.


Huh, my computer doesn’t seem to be affected.
I’m using Arch, btw.
I think I’m affected because I can’t access the C: Drive.
I’m using Debian, btw.
I think I’m affected because I can’t locate a c: drive.
I’m using Mint, BTW.
I managed to park over half the c:drive. I drive an X5, BMW.
I can’t spot my c: from this altitude, in my G6
greetings from the International Space Station
There’s your problem. You should be using Arch.
I use slackware, btw.
Seems like your pc isn’t affected because you don’t have a C drive? Try create a C drive and see if there’s an issue.
mount c:\windows /root
Fedora’s better ;) ~I posted this in a jocular mood, don’t take it seriously~