How To Fix Couldn’t Install MS Office with Error Code 30088-1021(0)

Many Windows 10 users have reported seeing an error when they try to install or update the Office application in their system. The error message reads as follows:

Couldn’t Install 

We’re sorry, we had a problem installing your Office program(s).

Please make sure the Office installation disk is inserted. Do you have enough free space on your main hard drive?

Please try installing again after you’ve checked the above.

Error Code: 30088-1021 (0)

This error is seen when the current installation of MS Office is corrupted or some of the underlying registry keys have been corrupted.Before proceeding, ensure the following :

  • The Office installation disk is inserted.
  • The Disk where you want to install MS Office has enough free space.

In this article, we have listed some fixes that might help you solve this error.

Fix 1: Repair the MS Office Application

Step 1: Open the Run Dialog. Hold the keys Windows+r together.

Step 2: In the Run window, type appwiz.cpl, and hit Enter 



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Step 3: In the Program and Features window that opens, locate Microsoft Office Suite or Microsoft 365. Right-click on it and select Change



Change Option



Step 4:  If the UAC pops up asking for permissions, click on Yes

Step 5: In the appearing Microsoft pop-up window, tick on Quick Repair.

Step 6: Click on the Repair button


Quick Repir


Step 7: Follow the instructions shown and repair the Office programs.

Step 8: Restart the application and check if the issue has been fixed.

Step 10: If the error is still present, try choosing Online Repair and click on Repair



Online Repair



Step 10: In the Ready to start an Online Repair Dialog, click on Repair



Confirmtion For Repair



Restart the application and check if the error has been fixed.

Fix 2: Use the Fix-It tool from Microsoft

Step 1: Open your browser and visit the Fix-IT Tool Download Page

Step 2: Click on the Download troubleshooter button as shown below.


Download Troubleshooter Min


Step 3: Double-click on the downloaded file. Note that this would have a .diagcab extension.

Step 4: In the appearing window, click on the Next button.


Click On Next In Troubleshooter


Step 5: The troubleshooter will now start detecting the problems. It will notify the problem and also suggest a necessary fix. Follow the on-screen instructions and complete the process.

Fix 3: Disk cleanup

Step 1: Open the Run Dialog using the keys Windows+R.

Step 2: Type the below command and press Enter.



Cleanmgr Exe In Run


Step 3: In the Disk Clean-up window, choose the drive where you want to install MS Office and click on OK.


Slect Disk

Step 4: Disk Cleanup utility will start scanning.

Step 5: In the appearing window, ensure Recycle Bin and Temporary Files are ticked.

Step 6: Click on OK.


Disk Cleanup Checkbox



Step 7: In the confirmation dialog that appears, click on Delete Files.



Delete Files Confirmation Dialog

That’s All.

We hope this article has been informative.

Kindly comment and let us know the fix that helped you fix the error.

Fix 4: Uninstall previous office version from your PC

1 – Press Windows and R key to open run command

2 – Type appwiz.cpl in it and hit enter key

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3 – Locate the previous office version installed , if any and right click and uninstall it

Ms Office Uninstall

Thank you for Reading.