Share via

Cannot access c drive, unable to open apps or install new apps.

Ayaan Nasim 0 Reputation points
2026-03-29T15:24:46.0966667+00:00

Cannot access c drive, unable to open apps or install new apps. I'm running windows 11.

Windows for home | Windows 11 | Settings
0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. DaveM121 866.2K Reputation points Independent Advisor
    2026-03-29T15:59:14.95+00:00

    1

    Before proceeding, do you have a Samsung device?

    2

    What happened on your PC before this problem occurred, was there a Windows update, or was it something else.

    3

    Open the Settings App (if you are able to).

    Go to Windows Updates - Update History, what is the KB number of the latest update installed on your system.

  2. Q&A Assist
    2026-03-29T15:25:04.6766667+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The symptoms match a known issue on some Samsung Galaxy Book 4 and Samsung desktop devices running Windows 11 24H2 or 25H2 where the C: drive becomes inaccessible (“C:\ is not accessible – Access denied”) and apps (Outlook, Office, browsers, system utilities, Microsoft Store apps) stop opening or installing.

    Root cause and status:

    • The problem is caused by a bug in the Samsung Galaxy Connect / Samsung Continuity Service app, which corrupts NTFS permissions on the C: drive.
    • Microsoft and Samsung have confirmed this is not caused by Windows Update itself but by that Samsung app changing C: drive permissions.
    • The faulty Galaxy Connect version has been removed from Microsoft Store, and Samsung has republished a stable version.
    • Recovery guidance is published in Microsoft’s Windows 11 release health documentation under the article “Recovery steps: Samsung Galaxy Connect or Samsung Continuity Service might cause loss of access to the C: drive”.

    What to do:

    1. Check whether the device is an affected Samsung model (for example Galaxy Book 4 or listed Samsung desktop models) running Windows 11 24H2 or 25H2. If so, follow the recovery steps in the Microsoft article referenced in the Windows 11 release health pages. Those steps restore the default NTFS permissions on C: so the drive and apps become accessible again.
    2. After recovery, uninstall or disable Samsung Galaxy Connect / Samsung Continuity Service to prevent the issue from recurring, and keep Windows and Samsung software updated.
    3. If the documented recovery steps do not fully restore access or if the device is not one of the listed Samsung models, contact Samsung support (for Samsung hardware) or PC manufacturer support with the details of the C: drive access issue.

    If the problem is instead limited to Microsoft Store apps not opening or installing (and C: is otherwise accessible), use the standard Store/app repair steps:

    1. Make sure Windows is fully updated: Start > Settings > Windows Update > Check for updates, then install any available updates.
    2. Update Microsoft Store: open Microsoft Store, go to Library > Get updates, and let Store update itself and other apps.
    3. Repair or reset affected apps: Start > Settings > Apps > Installed apps, select the app’s More icon > Advanced options, then choose Repair; if that does not help, choose Reset.
    4. If Store itself is having install issues, reset it using wsreset.exe (Windows key + R, type wsreset.exe, OK), then reopen Store and try installs/updates again.

    If C: remains inaccessible after following the Samsung/Microsoft recovery steps, do not attempt further resets that might erase data; instead, escalate directly to Samsung support with the C: access-denied symptom and Windows 11 version information.

    References:

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.