How to solve the error code 30015-6(-1): Office installation encountered an error

There are several steps you can take to try and resolve the error code 30015-6(-1) when installing Office:

1. Check your internet connection: Make sure you have a stable internet connection and that there are no issues with your network.
2. Disable antivirus software: Sometimes, antivirus software can interfere with the installation process. Try disabling your antivirus software temporarily and then attempt to install Office again.
3. Clear the Office installation cache: Clearing the Office installation cache can help resolve installation issues. To do this, follow these steps:
   • Press Windows key + R to open the Run dialog box.
   • Type %ProgramData%\Microsoft\Office\ and press Enter.
   • Delete all the files and folders in the Office folder.
   • Restart your computer and try installing Office again.
4. Use the Office uninstaller tool: If you have previously installed Office on your computer, use the Office uninstaller tool to remove any leftover files or settings. You can download the tool from the Microsoft website.
5. Try installing Office in safe mode: Sometimes, third-party applications can interfere with the installation process. Try installing Office in safe mode by following these steps:
   • Press Windows key + R to open the Run dialog box.
   • Type msconfig and press Enter.
   • In the System Configuration window, click on the Boot tab.
   • Check the box next to Safe boot and select the Minimal option.
   • Click Apply and then OK.
   • Restart your computer and try installing Office again.