Fix Microsoft Office 365 Error Code 0-1012

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In most cases, installing Microsoft Office is a very simple task. All you have to do is download the installer and just use the prompts. This gives you a new installation of MS Office on your system. However, in some cases, the installer will not start properly and will instead give you an error message that prevents you from installing. This can be very boring, but if you know exactly how to fix it, it doesn’t get really boring. One of the error messages or error codes that users encounter when installing MS Office is error code 0-1012.

The error message actually states that the problem can be caused by two things. If you are not connected to the Internet and are using the online MS Office installer, you may encounter the error. Second, the error may occur if there is not enough space on your hard drive for MS Office. While this is true and can be blamed for the causes, in some scenarios fixing these two problems doesn’t actually fix the error message.

Temporarily disable the firewall and antivirus

Error code 0-1012 (0) when installing or upgrading Microsoft Office can occur due to network or firewall restrictions. Network rules or network/computer firewall rules may block the installation of Office software or its updates as part of their security measures. These firewall and antivirus rules are implemented by the network provider or computer user in their primary system or computer registry.

You can eliminate error code 0-1012 (0) by temporarily disabling the firewall or virus protection software, or you can resolve error code 0-1012 (0) by creating an exception rule for Microsoft Office installations or updates.

Step 1: Open the Control Panel.

Step 2. Go to “System and Security”, then “Windows Firewall”.

Step 3. Click Turn Windows Firewall on or off.

Step 4. Select Disable firewall for private and public networks.

Step 5. Try installing or upgrading Microsoft Office and see if error code 0-1012 (0) disappears.

For more information: Click here to view Microsoft’s help article on disabling the Windows Firewall.

Disable proxy

A proxy server setting enabled on your Internet connection can also affect the installation of Microsoft Office. Error code 0-1012 (0) occurs when you install Microsoft Office over the Internet.



Updated: April 2025

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It is recommended that you temporarily disable the proxy settings. Likewise, you can install Microsoft Office without any error messages, such as B. Broadcast, launch, and save error.

To disable proxy settings, follow these steps:

  • Press the Windows key and the R key.
  • Type “appwiz.cpl”.
  • In Internet properties, click Connect.
  • Select LAN settings.
  • Disable proxy settings
  • Click Apply and OK.
  • Try installing Microsoft Office again

SFC scan.

System File Scan is a pre-installed Windows service that Windows users can use to find and repair corruption in Windows system files. The SFC scan detects corrupt files and restores or recovers a specific file from cached copies of system files located in a compressed folder in% WinDir% \system32 \ dllcache.

  1. First, make sure that the date and time on your computer are correct.
  2. open a command prompt with the administrative settings.
  3. Type “SFC / SCANNOW” and press the Enter key.
  4. Do not close the scanning window until it is 100% complete.
  5. Once the scan is complete, run the installation / update to ensure that error code 0-1012 (0) is resolved.

Perform a disk cleanup to eliminate error code 0-1012 (0).

A disk space error or lack of disk space on your computer can also cause a 0-1012 (0) error code when upgrading / installing Microsoft Office 365 or 2016. To resolve error code 0-1012 (0) due to disk space issue, it is recommended to clean your computer’s hard drive.

  1. open the Control Panel.
  2. click System and security.
  3. Select Administration.
  4. open “Disk Cleanup”.
  5. When the Hard Drive Cleanup window opens, select the C drive and click OK.
  6. Select the folders you want to clean and click OK.
  7. After the disk cleanup is complete, run the installation/upgrade to make sure that error code 0-1012 (0) is resolved.


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