issue with c drive and ms office 24 not opening showing errors

New Information. See -

Microsoft shares fix for Windows C: drive access issues on Samsung PCs

https://www.bleepingcomputer.com/news/microsoft/microsoft-shares-fix-for-windows-c-drive-access-issues-on-samsung-pcs/

AND

Recovery steps: Samsung Galaxy Connect or Samsung Continuity Service might cause loss of access to the C: drive

https://support.microsoft.com/en-us/topic/recovery-steps-samsung-galaxy-connect-or-samsung-continuity-service-might-cause-loss-of-access-to-the-c-drive-48c242aa-242a-4ddd-a9ad-98ea25fc04c1

These 2 articles discuss exactly the problem you're having. It's specific to Samsungs and is caused by KB5077181

Microsoft Weekly: Serious bug cripples Windows 11 drive C

https://www.neowin.net/news/microsoft-weekly-serious-bug-cripples-windows-11-drive-c-and-details-about-the-next-xbox/

Microsoft confirms Windows 11 bug crippling PCs and making drive C inaccessible

https://www.neowin.net/news/microsoft-confirms-windows-11-bug-crippling-pcs-and-making-drive-c-inaccessible/

Hi Nirmala Kumari,

I understand how disruptive this has been, especially when multiple core features stop working at the same time after an update. I can also see that Q&A Assist has already shared some initial guidance. To keep things simple and avoid any confusion, I’ll briefly recap the important points and then go over what to try next:

Step 1: Check and repair Windows system files

This step checks whether any Windows system files were corrupted or left in an incomplete state after the update.

1. Open Command Prompt and select Run as administrator.
2. Run the following command and wait for it to complete:

      DISM /Online /Cleanup-Image /RestoreHealth
   

3. After that finishes, run:

      sfc /scannow
   

4. Restart the device and check whether access to the C: drive or affected apps has improved.

Step 2: Test the system in Safe Mode

Safe Mode loads Windows with only essential services and drivers, which helps determine whether background software is contributing to the issue.

1. Restart the device and start Windows in Safe Mode.
2. While in Safe Mode, check whether you can access the C: drive and whether basic apps open normally.

If the issue does not occur in Safe Mode, it suggests the problem may be related to services or software that load during a normal startup.

Step 3: Perform a Clean Boot

A Clean Boot starts Windows normally but disables non‑Microsoft startup services, which helps narrow down possible conflicts.

1. Configure Windows for a Clean Boot and restart the device.
2. After the system starts, test whether Microsoft Office, screenshots, and Samsung apps open correctly and whether the repeated .NET prompt still appears.

*Disclaimer: A "clean boot" starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem. 

These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step so that it will help you get back on track. 

This step helps isolate whether a third‑party background service is involved.

Please avoid manually changing ownership or permissions on the entire C: drive, as this can cause additional system instability and make recovery more difficult. If the issue persists, please let me know:

• Whether SFC and DISM completed successfully and reported any repairs
• Whether the behavior is different in Safe Mode or Clean Boot
• Your current Windows version and build (type winver in the Search box, hit Enter and share the result)

I’ll be happy to review that information and continue assisting you.

If you have additional questions about this answer, please click "Comment".

Note: If you want to receive email notifications about this thread, follow the steps in our documentation to enable email notifications.

Based on the available information, only general Windows update troubleshooting steps can be provided.

1. Check network and rerun Windows Update
   • Select Start > Settings > Network & Internet > Wi‑Fi and verify the device is properly connected to the network.
   • Then go to Start > Settings > Update & Security > Windows Update > Check for updates and install any pending updates. This can fix driver and component issues introduced by a previous update.
2. Rename Windows Update cache folders This can repair a corrupted Windows Update store that may be causing system component problems.
   1. In the taskbar search box, type command prompt.
   2. Select Run as administrator, then Yes.
   3. In the Command Prompt window, run these commands one by one, pressing Enter after each and waiting for each to complete:
      • net stop bits
      • net stop wuauserv
      • ren %systemroot%\softwaredistribution softwaredistribution.bak
      • ren %systemroot%\system32\catroot2 catroot2.bak
      • net start bits
      • net start wuauserv
   4. Restart the PC and test whether apps and features behave normally.
3. Check disk and system health
   • In the taskbar search box, type command prompt, choose Run as administrator, then Yes.
   • Run: chkdsk /f C: and press Enter.
   • Accept the prompt to schedule at next restart if requested, then restart the PC so repairs can run.
4. Perform a clean restart A clean restart starts Windows with a minimal set of drivers and startup programs and can help identify whether third‑party software is blocking access to apps or system components. Follow the steps in how to perform a clean boot in Windows and then test:
   • Opening C: drive in File Explorer.
   • Launching Office and Samsung/Galaxy apps.
5. Temporarily remove third‑party security software If third‑party antivirus or security tools are installed, temporarily uninstall them, restart, and test again. Some security products can block access to drives, apps, or .NET components. Ensure product keys and installers are available before uninstalling so they can be reinstalled later.

If these steps do not resolve the issues, further vendor‑specific support from Samsung and Microsoft support would be required, but that information is not available in the provided context.

References:

• Troubleshoot problems updating Windows