How to fix
Microsoft Office error 30045-29
on Windows

I keep getting this strange error 30045-29 (1) at random times when using Office apps, which renders them almost unusable. I am using Windows 11 Home and had no problems with Office up till few days ago. Any ideas how to deal with this?

Error 30045-29 occurs when users are installing Microsoft Office or updating it in Windows. The problem may appear when the user is trying to open the Office applications after an update or while Office is being installed. The user will be faced with a program shutdown, and more than that, one cannot carry out the program which can be quite annoying and inconvenient.

When does this error occur?

The 30045-29 error comes in when installing or updating a Microsoft Office product, which can be either Word, Excel, PowerPoint, or Outlook. The error has been happening in relation to the Office app even after an update to Office or when installing Office from both the official website and third-party sources. There have been reports of encountering the error while trying to upgrade from an older version to a newer version of the Office or when issues persist in the configuration of the system.

How does the error happen?

The root cause of the error could be a variety of factors related to the Office installation process. Often, corrupted installation files, conflicts with antivirus software, or incomplete installation processes are to blame. Another common issue is interference from previous Office installations that weren’t properly removed, leaving behind corrupted registry entries or files that disrupt the new installation. Network-related problems can also contribute to the error, particularly when installation files can’t be downloaded or accessed correctly.

Error 30045-29 can happen due to a few common issues, such as:

• Corrupted installation files.
• Interference from antivirus software.
• Leftover files from previous Office installations.
• Outdated Windows system components.
• Network issues.

The 30045-29 error can be resolved through several methods, but users typically need to address the root cause, such as corrupted installation files or conflicts with security software. In some cases, performing a system cleanup or reinstalling Office may be necessary.

In some cases where users experience perpetual issues, there is the option of a complete repair and maintenance utility-a repair such as [d1] might fix problems deeper in the system contributing to this error.

After trying these methods for troubleshooting, one could actually get to work and restore the application of Microsoft Office as the applied fix shall make this possible.

Fix 1. Repair Office installation

Issues with the installation files can cause this error. Repairing the Office installation can help resolve corrupted or incomplete files.

• Type Control Panel in Windows search and press Enter.
• Select Programs > Programs and Features.
• Select Microsoft Office and click on Change.
• Choose the option for Quick Repair and click Repair.
• Follow the prompts to finish the process.
• If the issue persists, select Online Repair for a more thorough fix.

Fix 2. Remove conflicting Office files

Leftover files from previous Office installations may create conflicts.

• In Windows search, type %localappdata%\Microsoft\Office\16.0\OfficeFileCache and press Enter to navigate to the OfficeFileCache folder.
• Delete all files within the OfficeFileCache folder - press Shift + Del for quick action.
• After clearing the cache, restart your computer and attempt the Office installation again.

Fix 3. Try Clean Boot

A clean boot will help in eliminating the software conflict that may be preventing the installation of Microsoft Office and thus bringing up the error code 30045-29.

• Type msconfig in the Windows search box and press Enter.
• Pick the Services tab.
• Mark Hide all Microsoft services and select Disable all.
• Select the Startup tab and click Open Task Manager.
• In the Task Manager, right-click on each of the items and select Disable, then close the Task Manager.
• Go to the Boot tab, mark the Safe Boot option, then click Apply and OK.
• On the System Configuration window, click OK.
• To find out which app(s) is causing conflicts, enable each of the processes (or you can do it in groups), restart, and see if the problem persists. Repeat until you find the faulty app, then either update or uninstall it.

Fix 4. Update Windows components

Outdated Windows components can interfere with the Office installation. Ensuring your system is updated helps prevent this.

• In Windows search, type Updates and hit Enter.
• In the new window, click Check for updates and wait till everything is installed.
• Make sure you also install any available optional updates.
• When done, restart your system to implement the changes.

Fix 5. Reset your network

Network issues may disrupt the download or installation process. A reset can resolve connectivity problems.

• Type cmd in Windows search.
• Right-click on the Command Prompt result and select Run as administrator.
• Copy and paste each of the following commands, pressing Enter every time:
  ipconfig /flushdns
  ipconfig /registerdns
  ipconfig /release
  ipconfig /renew
  netsh winsock reset
• Restart your computer.

Fix 6. Reinstall Office

Reinstallation of Office will ensure that all files are downloaded and installed properly.

• Right-click on Start and pick Apps and Features/Installed apps.
• Scroll down to find the MS Office installation.
• Click Uninstall and confirm with Uninstall.
• Follow on-screen instructions to remove the app completely.
• Press Win + E to open File Explorer.
• Navigate to the following location and delete its contents:
  C:\Program Files\Microsoft Office
• Next, type regedit in Windows search and press Enter.
• Go to the following locations in the Registry Editor and delete these items:
  Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AppVISV
  Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun
  Computer\HKEY_CURRENT_USER\Software\Microsoft\Office
• Reboot the PC and then reinstall Microsoft Office.