How to Fix Microsoft Office 365 Error Code 0-1012

Is your screen displaying the Microsoft Office 365 error code 0-1012 on Windows?

Microsoft Office 365 Error Code 0-1012

Microsoft Office has been an integral part of computing for decades, and everyone, including you and me, has used it at some point in our lives. 

From creating word documents to spreadsheets and presentations, Microsoft Office offers it all. This tool is so popular that over a billion people worldwide use it, and this number increases every day. 

However, installing Microsoft Office 365 on devices is not straightforward for everyone. There are times when users encounter unknown errors upon attempting to install it, and such error is the error code 0-1012. It occurs for a variety of reasons, including corruption within the system itself and outdated installation files. 

If you are reading this right now, there is a fair chance that you are struggling to install Microsoft Office 365 on your PC but don’t worry. In this guide, we have listed some of the most effective solutions that can help you resolve the issue in no time. 

Let’s dive right into it!

1. Disable Windows Firewall.

If your screen displays the Microsoft Office 365 error code 0-1012, then the first thing you should do is disable the Windows Defender and then retry installing the Microsoft Office. 

Several users found Windows Defender to be the culprit, as it was blocking the installation due to a false security alarm. There is a high chance that the exact reason is preventing your system from installing Microsoft Office, which is why we recommend disabling Windows Firewall temporarily.  

Here is what you need to do:

  1. Open Control Panel and navigate to System and Security.
  2. Select Windows Defender Firewall from the right panel and then turn Windows Firewall off for both public and private networks. 
Microsoft Office 365 Error Code 0-1012 Microsoft Office 365 Error Code 0-1012
  1. Now retry installing Office 365 and check if the issue is resolved. 

If Windows Firewall was causing the issue, disabling it will resolve it. Once you have downloaded the Office file, you can enable Windows Defender again. 

2. Change User Account.

If you have more than one user account on your PC, then it is possible that the account you are using does not have administrative rights to install a program like Office 365. This mostly occurs when accounts other than the administrative account have remote access to the system. 

The easiest way to resolve this issue is to switch to an account with administrative privileges.

Here is what you need to do:

  1. Click on the Windows icon on your taskbar and select your user icon.
  2. Now click on Change Account Settings to launch the Settings window.
Change account settings
  1. Check if the account you are using has administrative privileges.
  2. If not, select Family & other users and in the list of accounts available, log in with the administrative account.
  3. Finally, restart your PC and try installing Microsoft Office 365 again.

If you were using an account with remote access, switching to an administrative account will fix the issue.

3. Try Using CleanMyPC.

If you haven’t cleaned your PC in a long time, then now might be the right time to do so. Over time, junk files get accumulated in our system, causing errors like the one under discussion. If these files are not eliminated, they can also affect your PC’s overall speed and performance. 

The best way to get rid of such files is by deep cleaning your PC, and while this can be done both manually and through cleaning software, we recommend using a reliable PC cleaner. We recently tested a few online cleaners and found CleanMyPC to be the best. 

Install CleanMyPC on your PC

CleanMyPC comes with a wide range of system maintenance tools, including a Multi Uninstaller, Cleaner, Speed Booster, and Privacy Protector that can handle all of your PC-related issues. All you need to do is run a scan using CleanMyPC, and the rest will be taken care of.

Install CleanMyPC now and give your PC a much-needed performance boost. 

Try CleanMyPC Now!

4. Remove the Previous Office Installation. 

Are you trying to install the new Office installation without removing the previous one from your system? If yes, then that might be causing the issue. 

It is common for the previous installations of a program to conflict with the latest ones, which as a result, prevents the system from installing the latest version properly. This issue can be resolved by removing the previous Office installation entirely and then installing the new one. 

Here is how you can do that:

  1. Download CleanMyPC and uninstall the previous Office installation and other unwanted apps using the Multi Uninstaller as described in the 4th Method. 
  2. Once the uninstallation is complete, right-click in the Windows icon on the taskbar and select Windows Powershell (Admin) from the list of options available. 
  3. Inside the Powershell window, type the commands mentioned below and hit Enter
reg delete HKLM\SOFTWARE\Microsoft\ClickToRun\OverRide /v LogLevel /f
  1. Now check if the issue is resolved. If not, execute the command mentioned below. 
reg delete HKLM\SOFTWARE\Microsoft\ClickToRun\OverRide

Hopefully, you will now be able to install Office 365 without any issues.

This wraps up our guide on fixing the Microsoft Office 365 error code 0-1012 on Windows. We hope that one of the troubleshooting steps did the trick for you. If you have any questions regarding the methods, please let us know in the comment section below. We will try to assist you as much as we can!

If this guide helped you, please share it. 🙂


  • Zainab Falak

    Zainab Falak is a staff writer for Saint and an expert in Microsoft Windows, having authored more than 200 posts. She has a Bachelors in Actuarial Sciences and her passion for computers extends to exploring various aspects, from UI customization to the Windows registry and exploring error codes. Twitter LinkedIn

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