March 17, 2026, 12:03 pm | Read time: 2 minutes
The Windows 11 update from February 2026 has caused frustration for many users. Both private users and businesses have reported various problems since then. New errors have repeatedly emerged, affecting both hardware and software. While the subsequent update in March has not yet made negative headlines, the impact of the February patch is still noticeable for some users.
Owners of a Samsung Galaxy Book appear to be particularly affected. According to a report from “Neowin,” access to the central drive C is no longer possible after installing the update. Microsoft confirms on its service pages that in Windows 11 25H2 and 24H2, many important programs only display the message “C:\ is not accessible – Access denied.”
Many Programs and Functions Restricted
The error message appears in programs such as Outlook, Office applications, and web browsers. Even system programs can be affected. The error occurs independently of specific programs and affects the general use of the drive. This means that everyday tasks like opening or saving files are significantly restricted.
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Cause Apparently Lies with Samsung App
There are now indications of the cause of the problem. According to Microsoft, the Samsung Galaxy Connect app is suspected of triggering the error. The application is actually intended to connect multiple Samsung devices. Users can, for example, exchange files via Quick Share. However, in connection with the February update, it seems to cause an unexpected side effect that blocks access to drive C.
No Easy Solution for Those Affected
Microsoft has responded by removing the current version of the app from the Microsoft Store. At the same time, a stable version has been provided to prevent further issues. However, for users already affected, there is currently no easy solution. Resetting the update is not an option. This is because drive C is usually the storage location for system updates. If this drive is inaccessible, the patch cannot be removed.
Both Microsoft and Samsung have confirmed that they are working on a solution. When a corresponding update will be released is not yet known. Affected users will have to be patient for the time being.