Samsung laptops

Microsoft is investigating an issue affecting some Samsung laptops running Windows 11, particularly after the February 2026 security updates, where users are losing access to their C: drive. This problem prevents them from launching essential applications and is reported to display an error message stating, "C: is not accessible – Access denied." The issue appears to be linked to specific Samsung software, with reports mainly coming from Brazil, Portugal, South Korea, and India, particularly involving the Samsung Galaxy Book 4. The problem is confined to Windows 11 versions 25H2 and 24H2. A workaround has been suggested that involves changing the ownership of the C: drive to the "Everyone" group, but this poses security risks, and users are advised to wait for an official fix from Microsoft.