Microsoft has blamed Samsung for some devices suffering C:\ drive access problems coincidentally close to March’s Patch Tuesday.
Users saw the message “C:\ is not accessible – Access denied” when trying to launch applications, including Office, browsers, and utilities such as Quick Assist.
An access denied error when trying to access the C:\ drive is certainly a bad day for Windows users. The C:\ drive is usually assigned to the first bootable disk partition and is where system files and applications are typically located.
However, for some users running Windows 11 24H2 and 25H2, the C:\ drive became inaccessible, with reports of the issue occurring around the time of the March Patch Tuesday…