Microsoft issues Windows warning as PCs hit by | Tech News
Microsoft just lately launched a main security replace that addressed a number of issues and flaws in Windows 11. However, some customers who’ve put in the very important patch at the moment are affected by a crippling bug that’s leaving them blocked from information and unable to launch sure purposes, together with Microsoft Outlook, Office apps and sure web browsers.
The error seems to be blocking entry to the C drive on PCs with these affected seeing the message “C:is not accessible – Access denied.”
It’s clearly a nightmare for anybody unfortunate enough to have been hit by this gremlin, however not everyone seems to be affected by it. It’s been confirmed that PCs made by Samsung, together with the Galaxy Book 4, are on the hit record.
“Microsoft has received reports of an issue in which some Samsung device models lose access to the C: drive after installing the February 2026 security update (KB5077181) and subsequent updates,” Microsoft confirmed.
“Users might encounter the error, “C: is not accessible – Access denied”, which prevents access to files and blocks the launch of some applications including Outlook, Office apps, web browsers, system utilities and Quick Assist.
“Affected gadgets encounter the problem when customers execute common actions, such as accessing information, launching purposes, or performing administrative duties, and don’t require any particular consumer motion past routine operations. In some instances, customers are additionally unable to raise privileges, uninstall updates, or gather logs as a result of permission failures.”
Microsoft says the issue has been reported across the world, including Europe, Brazil and India.
The US firm’s latest investigations indicate that the issue may be related to the Samsung Share application, though the root cause has not yet been fully validated.
It’s unclear when a fix will be rolled out but if you own a Samsung PC and haven’t updated to Windows 11 versions 24H2 and 25H2 to might be a good idea to wait.
Those still on Windows 11 variations 24H2 and 25H2 can be smart to remain put.
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