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Microsoft Office 365/2021/2019 installation Error code 30015-26 (3)

This describes the Microsoft Office 365/2021/2019 installation Error code 30015-26 (3) solutions in this article. Office update 365/2021/2019 error code 30015-26 (3) was found that many users having trouble repairing or installing office programs on their Windows and Mac computers.

The majority of issues are due to Office licensingWindows updates, insufficient system resources like disk space, Internet connectivity, etc. So this article provides the solution for different kinds of office issues related to Office 365 installation Error code 30015-26 (3).

Office error code 30015-26 (3) Returns following error messages

  • Something went wrong Error code 0-1018 Go online for additional help.
  • Office program is Busy, There is a problem starting the Office Installation.
  • We are sorry, but we are unable to start your office installation program.
  • Sorry office installation can’t continue because no compatible office products are detected.
  • We are sorry, but we can’t verify the signature of office files required to install your office product.
  • Internet connection needed. Office installation program error code 0-1018.
  • Background office program installation ran into a problem.

Something went wrong Error code 30015-26 (3) Go online for additional support.

When operating system unable to add and/or remove the products that you are requesting, It requests you to verify file’s signature that required to install the office product. Usually, returns error code series 300XX, 1xxx series depends on the cause of the issue.

Something Went Wrong

Microsoft Office is Busy, There is a problem starting the Office program Installation

It appears when you try to open any office program like word ,excel etc., and the office already in progress .it gives a message “we are either updating or helping you add/ or remove some office programs.

Sorry, we ran into a problem Error code 30015-26 (3)-Sorry installation can’t continue because no compatible office products are detected.

A Microsoft Windows Operating system is released in two different bit versions depending on the hardware architecture such like 32 and 64. It is required to install relevant versions of office suitable for the Windows Operating systems. In case of any mismatch in the versions selected, you can see this error message that says no compatible office products are detected.

We are sorry, but we can’t verify the signature of files required to install your office product.

An Office product package is available in different forms like a disc or a click to run. In the case of a disc failure, you might see this error message which says signatures of files required to install the office product.

can't Verify Signature

Internet connection needed. Office program error code 0-1018.

While you performing the online repair for your office product this error message may occur due to internet problems. You can do a quick offline repair.

Also, Installation of Microsoft Office requires an internet connection depending on the version. The latest Office 365 suite comes with a click to run version which is a small setup file when you click on it, that would start the installation by downloading all the required files for the program.

Internet Connection

Background office program Installation ran into a problem

This causes when your Office installation program related files are corrupted. It is required to repair your Office program. In addition, we need to check for malware or virus related issues on your computer.

Background installation ran into a problem

Unable to start Office 365/2021 installation program

This message explains that the program has been stopped by your Windows and unable to start the office 365/2021 program. The computer must be scanned using Windows system file scan process. This also shows that Office related files are missing from office 365 installation Program folders. If this happened recently with any of your clean up programs, a system restore could help you to fix the same.

Diagnose your computer to fix office installation error code 30015-26 (3)

There are a few ironically shown Office error code 30015-26 (3) which require immediate action. There will be a log for every action on your computer that records all the events. It is termed as an Event viewer. This is a Windows Inbuilt program under system tools, it provides all the information for the problem-causing keys.

This could cause due to the failure with your Windows related services and the executable file is unable to read the required files when you try installing Office program. There may be issues with the start up programs which can be checked under System Configuration.

Perform system file scan

System file scan in short SFC scan is windows inbuilt program to fix altered/modified and damaged files of the operating system. It can fix several updates failures, other violations done by several mismatched files.

To Run system file scan in your windows operating system,

  1. first Open command prompt (CMD) in admin mode and 
  2. run the command SFC/SCANNOW

Office error 30015-26 (3) also can be fixed with this scan if they are not damaged much. If you see any file violations still exists after the scan then move to Event viewer to check what has caused the office installation program error code 30015-26 (3)

How to use Event viewer to check office error logs

  • Click on a start button
  • Type “RUN” and open the Run command prompt
  • Type “EVENT VIEWER” and press enter key to open Event viewer logs

error code 30015-26 (3)

  • Double click on “windows logs” from the left-side panel and select “application”
  • Now you can see many logs in the center panel
  • Filter the logs to find office related issues and warnings by selecting Filter current log option from the Right side panel

error code 30015-26 (3)


Find any critical, error logs the caused error code 30015-26 (3). If you can’t find any reasons for the issues then just take a chance to do a clean office 365/2021 installation to save your time.

Repair/Uninstall office installation program

Applies To: Office 2019, Office for business, Office 365 Admin, Office 365 Small Business Admin, Office 2021



The following steps describe how to uninstall Office 2019 or 2021 products on a PC (laptop, desktop, or 2-in-1).
For other versions of Office, including Office 2019 for Mac, or older versions of Office, see the section, Uninstall Office for Mac, Office 2021, or Office 2019 below. 
Try uninstalling Office using the Control Panel first. If that doesn’t work use the easy fix tool or try uninstalling Office manually.

For Windows 8 / Windows 11/10:-

  1. Go to control panel from start button,
  2. Select “Programs and Features“ there to reach a list of installed programs on your computer. (In windows 10 you can just type “programs and features in the Cortana search bar beside windows start logo)
  3. From the list, search for Microsoft Office product and click on Change
  4. A windows will open like here showing Add, Repair, Remove options
  5. Then proceed to with repair and wait for sometimes. Once the repair is successful you are ready to use Microsoft office product again.
  6. To uninstall follow the first 4 steps from repair process, and choose to Remove instead of repair.

IMPORTANT:. It’s impossible to uninstall office applications (word, excel, publisher etc) individually from total office product. The only way to uninstall an individual app is if you purchased it as a stand-alone version.

Installing Office Product

  1. Once you have done the uninstallation part, now do a clean installation.
  2. Login to your Microsoft office account
  3. Go to your dashboard to see the product you purchased.
  4. Select “Install Office “ option and then let it download, (you may see click SaveRunSetup, or Save File depends on browser type, select “save” for future purpose)
  5. Go to downloads in your computer and Double click on office setup file to install.

Windows Registry Fix

The registry in Windows is a console that shows the structure of your Windows Operating system and it’s internal programs. 

The Hex code inside the registry may change due to some unwanted conflicting programs which use the same resources.

To fix the error code 30015-26 (3) in office 365/2021/2019 you need to delete the altered Office Registry keys or remove and re-create the keys with previous values. (HEXA CODE or H-KEYS).

Note: Don’t do Registry changes if you are not aware of the structure as it damages applications with one single change. Sometimes damages your computer operating system.


At last, if you are still not able to resolve this issue Error Code 30015-26 (3). I am sure they will help you resolve this issue. If you like to see the procedure for paid support, to clarify, you may ask the Tech Available online.

Take a support from Online experts regarding any unresolved issues on your computer.

Chat with our technician to fix your computer issues Now!

Chat with us for more Technical Support.

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