Error Code 30015-26 (1006) is typically associated with Microsoft 365, Office 2019, 2021, or Office 365 versions. It occurs when there is a problem with the installation or update process, preventing the successful completion of the operation. The Office Error Code 30015-26 (1006) message may vary slightly, but it generally indicates that Office  2021/2019 cannot be installed or updated due to certain underlying issues

Solutions to Fix Microsoft 365 or Office 2021/2019 Error 30015-26 (1006)

Now that we understand the potential causes of Error 30015-26 (1006), let’s explore some effective solutions to resolve the issue:

Solution 1: Check Network Connectivity 

Ensure that your internet connection is stable and reliable. Restart your modem/router and try running the Office installation/update process again. If you are using a Wi-Fi connection, consider switching to a wired connection for a more stable network environment.

Solution 2: Disable Antivirus/Security Software

Temporarily disable any antivirus or security software running on your computer. These programs may mistakenly flag Office installation files as malicious and prevent their installation. Once disabled, try installing/updating Office 2021/2019 again. Remember to re-enable your antivirus software after the installation process completes.

Solution 3: Use the Office Installation Troubleshooter 

Microsoft provides a helpful tool called the “Office Installation Troubleshooter,” which can automatically diagnose and fix common installation issues. Download the troubleshooter from the official Microsoft website and run it on your system. Follow the instructions provided by the troubleshooter to fix any identified problems

Common Causes of Error Code 30015-26 (1006)

Network Connectivity Issues:

Poor or unstable internet connection during the installation or update process can cause this error 30015-26(1006) to occur. Network interruptions, slow speeds, or firewall settings can interfere with the Office installation process.

Conflicting Programs:

Antivirus or security software on your computer can sometimes interfere with the Office installation process, leading to the occurrence of Microsoft Office Error 30015-26 (1006). These programs may incorrectly identify Office files as potentially harmful and prevent their installation.

Incomplete/Corrupted Installation Files:

If the installation files of Office are incomplete or corrupted, you may encounter this error 30015-25(1006). This can happen due to interrupted downloads, file corruption during extraction, or other factors.

More Quick Solutions to fix this Microsoft Office Error Code 30015-26 (1006)

Solution 4: Uninstall and Reinstall Office 

If the above solutions do not resolve the issue, you may need to uninstall and reinstall Microsoft 365 or Office 2021/2019. Use the official Office Uninstall Support Tool provided by Microsoft to completely remove Office from your system. Once uninstalled, restart your computer and reinstall Office using a fresh installation file obtained from the official Microsoft website.

Solution 5: Contact Microsoft Support 

If none of the above solutions work, it’s advisable to reach out to Microsoft Support for further assistance. Microsoft’s support team can provide personalized guidance based on your specific situation and help you resolve the Error 30015-26 (1006).



Error Code 30015-26 (1006) in Microsoft Office can be resolved by following the troubleshooting steps outlined above. It’s important to identify the underlying cause of the error and apply the appropriate solution to ensure a successful Office Installation or Update. If need more help get in touch with Microsoft support team

Assured Assist Banner Logo

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

     Delivering exceptional Assistance

                 – “Reliable Tech Support for Any Situation”.

Leave a Reply

Your email address will not be published. Required fields are marked *