Samsung Update ruins Windows PCs – Microsoft Confirms
OEM software bloat strikes again – Samsung Connect App causes mayhem
Earlier this month, reports came in that Windows 11’s March 2026 updates were preventing users from accessing their C: drive. Following an investigation by Microsoft, via Windows Latest, it was uncovered that these issues predated Windows 11’s March update. In fact, it wasn’t caused by Windows at all; Samsung is at fault.
All affected systems were made by Samsung, and the issue was found to be caused by OEM software, not Windows itself. Specifically, the Samsung Galaxy Connect App is causing the problem. Until this problem is fixed, Microsoft has removed the app from its PC app store.
Microsoft and Samsung have released guidance on how users of affected systems can recover them. Thankfully, the damage appears to be reversible.
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. 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.
Microsoft and Samsung investigated these reports and concluded that the symptoms were caused by an issue in the Samsung Galaxy Connect app. While the reports coincided with recent March Patch Tuesday timing, investigation confirmed the issue is not caused by current or previous Windows monthly updates. The issue has been observed on Samsung Galaxy Book 4 and Samsung Desktop models running Windows 11, versions 24H2 and 25H2, including NP750XGJ, NP750XGL, NP754XGJ, NP754XFG, NP754XGK, DM500SGA, DM500TDA, DM500TGA, and DM501SGA.
Affected devices encounter the issue when users execute common actions, such as accessing files, launching applications, or performing administrative tasks, and do not require any specific user action beyond routine operations. In some cases, users are also unable to elevate privileges, uninstall updates, or collect logs due to permission failures.
Resolution: This issue can be resolved on affected devices by following the guidance documented in the Microsoft KB article “Recovery steps: Samsung Galaxy Connect or Samsung Continuity Service might cause loss of access to the C: drive.”
Microsoft and Samsung collaborated to validate these steps, which restore standard Windows permissions.
For device-specific assistance, please contact Samsung’s support channels.
Note: Mitigations to prevent additional devices from encountering this issue were implemented starting March 14, 2026 (Pacific Time). As part of these mitigations, the affected Samsung Galaxy Connect application was temporarily removed from the Microsoft Store, and Samsung republished a stable previous version of the application to prevent recurrence.
Samsung’s OEM bloat broke its Windows laptops and desktops
This incident is a reminder that OEM software isn’t guaranteed to be free of issues. If PC buyers want to avoid issues like this, they should consider reinstalling Windows on new systems using Microsoft-supplied ISOs or uninstalling all OEM bloatware when they first start using new PCs.
Initially, these issues were reported as being related to Windows 11’s March 2026 update. This was not true, though it didn’t stop many people online from reporting this as being the case. While Microsoft’s reputation amongst Windows users isn’t strong right now, its March 2026 update has been largely free of problems. That said, Microsoft still needs to act to make Windows a faster and more reliable OS for its users. There’s a reason why the internet was so quick to blame Microsoft for these issues.
You can join the discussion on Samsung’s Connect app causing mayhem for Windows 11 users on the OC3D Forums.
