Error Message: Explorer.exe Class not registered

Question

I am attempting to open applications from my task bar. I can open File Explorer and Microsoft Edge. For everything else, I am receiving the error message "Explorer.exe Class not registered."

I cannot open anything else on the task bar.

When I enter File Explorer and attempt to open PowerShell as administrator, I am prompted with a window asking me if I want to allow changes to my device. I select "yes" and the window disappears, but nothing happens and no other windows open.

Please help!

Answer 1

Hi, Peter Utman

This error usually points to a damaged Windows user profile or a background program interfering with the Windows shell. Since PowerShell does not open after approval, use options that do not depend on it.

Besides the solutions provided by the Q&A Assist, here are some suggestions you can try:

Test Safe Mode. Hold Shift while selecting Power > Restart, then choose Troubleshoot > Advanced options > Startup Settings > Restart > 4. Safe Mode loads only essential drivers and services. If the taskbar works there, a startup program or third-party service is likely causing the problem. Windows startup settings

While in Safe Mode, press Windows + R, enter msconfig, and select OK. On Services, select Hide all Microsoft services, then Disable all. On Startup, open Task Manager and disable startup items. Restart normally and test again.

If the issue started recently, press Windows + R, enter rstrui.exe, and choose a restore point dated before the problem began. System Restore rolls back system files, registry settings, and installed programs without affecting personal files. Use System Restore

If Safe Mode also has the same issue, an in-place repair installation would be the next least-destructive option.

Thank you for your patience in reading, I hope this information has been helpful to you. 

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Answer 2

Try these steps in order:

1. Install Windows updates and restart
   • In Windows 11: Start > Settings > Windows Update > Check for updates.
   • In Windows 10: Start > Settings > Update & Security > Windows Update > Check for updates.
   • Install any available updates, then restart the PC.
2. Restart Windows Explorer
   • Press Ctrl + Shift + Esc to open Task Manager.
   • Find Windows Explorer in the process list.
   • Right-click it and select Restart.
   • This can refresh the taskbar and shell without a full reboot.
3. Run System File Checker
   • Since taskbar apps and elevated PowerShell are failing, check for missing or corrupted system files.
   • Open an elevated Command Prompt if possible and run:

          sfc /scannow
     

   • Restart after the scan completes.
4. Optimize advanced system settings and virtual memory
   • Open Control Panel from the taskbar search.
   • Go to System and Security > System > Advanced system settings.
   • On the Advanced tab, under Performance, select Settings > Advanced.
   • Confirm Adjust for best performance of is set to Programs.
   • Under Virtual memory, select Change and make sure Automatically manage paging file sizes for all drives is selected.
   • Select OK > Apply, then restart.
5. Run Disk Cleanup
   • Search for Disk Cleanup.
   • Select a drive, select OK, choose the file types to remove, then select OK.
   • Make sure nothing important is in the Recycle Bin before emptying it.
6. Run the System Maintenance troubleshooter
   • Open Control Panel.
   • Set View by to Large icons or Small icons.
   • Go to Troubleshooting > View all > System Maintenance.
   • Select Next > Try troubleshooting as an administrator.
7. Run Automatic Repair
   • This attempts to fix registry corruption.
   • In Windows 10: Start > Settings > Update & Security > Recovery.
   • Under Advanced startup, select Restart now.
   • On Choose an option, select Troubleshoot > Advanced options > Startup Repair.
   • Choose an account and enter the password.
   • The PC may restart during this process.
8. Reset the PC if the issue continues
   • If File Explorer still works but taskbar apps and shell components remain broken after the steps above, resetting Windows is listed as the next option.

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