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How to Fix Microsoft office Error code 30015-26 (1006)

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Error 30015-26 (1006) is a common issue encountered by users of Microsoft Office, particularly when attempting to install or update the software. This error code 30015-26 (1006)  typically indicates a problem with the installation process or conflicts with existing components on the computer.

It can be frustrating and prevent users from successfully completing the installation or updating their Office suite.

Troubleshooting Steps to fix Microsoft 365 Error 30015-26 (1006) :

Follow these troubleshooting steps to resolve Error 30015-26 (1006) in Microsoft Office:

Step 1: Check your internet connection.

Ensure that your internet connection is stable and working properly. If you’re using a wireless connection, try switching to a wired connection for the duration of the installation or update process.

Step 2: Disable antivirus and firewall temporarily.

Temporarily disable any third-party antivirus or firewall software on your system. These applications may be blocking or interfering with the Office installation/update process. Once disabled, attempt the installation, or update again.

Step 3: Run the Office Repair Tool.

Microsoft Office provides a built-in Repair Tool that can help fix common installation issues. Follow these steps:
 a. Press the Windows key + R, type “appwiz.cpl” and press Enter.
 b. Locate Microsoft Office in the list of installed programs, right-click on it, and select Change.
 c. In the Office Installation window, select “Repair” and follow the on-screen instructions.

Possible Causes for this Microsoft 365 Error 30015-26 (1006):

Microsoft 365 Error 30015-26 (1006) can be triggered by various factors.

Internet connectivity issues:

Poor or intermittent internet connection during the installation or update process can lead to this error 30015-26 (1006) .

Conflicting or outdated versions:

Presence of incompatible or outdated Office components on your system can interfere with the installation or update process.

Third-party antivirus or firewall software:

Security software, such as antivirus or firewall applications, can sometimes conflict with Microsoft Office installation or update, resulting in this error code 30015-26 (1006).

Corrupted installation files:

If the installation files of Microsoft Office are corrupt or incomplete, it can cause the Microsoft Error 30015-26 (1006).

More Quick Solutions to Fix this Microsoft Office 365 Error Code 30015-26(1006):

Step 1: Uninstall and reinstall Microsoft Office:

If the previous steps didn’t resolve the issue, you can try
uninstalling and reinstalling Microsoft Office. Remember to keep a backup of
your important files before proceeding.
a. Press the Windows key + R, type “appwiz.cpl” and pressEnter.
b. Locate Microsoft Office in the list of installed programs,right-click on it, and select Uninstall.
c. After uninstalling, download the latest version of Microsoft Office from the official Microsoft website and follow the installation instructions.

Step 2: Use the Office Deployment Tool (ODT) 

For advanced users or system administrators, the Office Deployment Tool (ODT) can be used to customise and control the installation of Microsoft Office. Refer to Microsoft’s official documentation on using the ODT to resolve installation issues.


Encountering Error 30015-26 (1006) in Microsoft Office can disrupt your productivity, but with the troubleshooting steps mentioned above, you should be able to resolve the issue. If the problem persists, don’t hesitate to seek assistance from your IT department.

There could be several reasons why Office encountered this error. It might be a connectivity issue, corrupted system files, a malfunctioning Windows service, or not enough space to install new updates.

  1. Check Network Connectivity
  2. Disable Antivirus/Security  Software
  3. Use  the Office Installation Troubleshooter
  4. Uninstall and Reinstall Office.
  5. Contact Microsoft Support.

1.Network Connectivity Issues
2. Conflicting programs
3. Incomplete/corrupted Installation files.

  1. Right click start menu 
  2. select installed apps on the top menu. 
  3. Type in search app for your office program

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