A latest Home windows 11 safety replace has induced important points for quite a few customers, stopping entry to the first C: drive with an “Entry denied” error. Microsoft confirms the issue stems from the February 2026 replace (KB5077181) and primarily impacts Samsung laptops.
Bug Particulars and Influence
The error message “C: will not be accessible – Entry denied” seems when customers try to entry information, launch functions, or carry out administrative duties. This disrupts important applications like Workplace apps and net browsers, rendering methods almost unusable for these affected.
Solely Home windows 11 variations 24H2 and 25H2 face this difficulty, with stories rising from areas together with Brazil, Portugal, Korea, and India. Microsoft signifies a possible hyperlink to the Samsung Share app, although affirmation stays pending.
Microsoft’s Response
Microsoft states it’s actively investigating the bug in collaboration with Samsung. Updates will observe as soon as extra particulars emerge. Affected customers expertise widespread disruptions to every day operations.
Workarounds and Options
To resolve the problem, customers can roll again the problematic replace by way of Settings > Home windows Replace, following Microsoft’s normal rollback course of. These but to put in the February 2026 replace ought to pause it briefly.
Neighborhood recommendations on boards embrace altering C: drive possession, which has succeeded for some however carries dangers. Proceed cautiously with such strategies, prioritizing official fixes.
