Microsoft says, for once, Windows update isn't to blame for Galaxy Book4 laptops losing access to C: drive — the Galaxy Connect app was the culprit, and it's been taken down from Microsoft Store

Microsoft clarified that a recent issue causing Galaxy Book4 laptops to lose access to their C: drive was not due to a Windows update but was caused by the Galaxy Connect app. This app, used for screen sharing with Samsung Galaxy phones, interfered with Windows, leading to permission revocation and drive access problems. Microsoft and Samsung have addressed the issue by removing the app from the Microsoft Store and providing recovery steps for affected users. The problem was identified before the February 2026 Windows 11 security update, and Microsoft has marked it as "externally resolved."