How to Fix Microsoft 365 Update Error 30045-29(1)
Question details
The user is unable to install available updates for Word, Excel, and Outlook due to a specific update failure code.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Clicking the 'Update Now' button in Microsoft 365 applications to apply the latest software updates.
- Observed behavior
- Instead of downloading and installing the updates, the system throws an error code 30045-29(1).
Ensure you have a stable internet connection and your Microsoft account credentials ready, as resolving this error may require downloading repair files or completely reinstalling the software.
Perform an Office Online Repair
Use the built-in Windows repair tool to fix corrupted Office installation files that are preventing the update from completing.
An Online Repair is often the most effective way to resolve update errors because it contacts Microsoft's servers to download fresh, uncorrupted files for your existing installation.
Navigate to your computer's Settings and open the 'Apps' or 'Installed Apps' section.
Scroll through the list of installed programs until you find 'Microsoft 365' or 'Microsoft Office'.
Click on the application (or the three dots next to it) and select 'Modify'. If prompted by User Account Control, click 'Yes'.
Choose the 'Online Repair' option from the dialog box and click 'Repair'. Follow the on-screen prompts and wait for the process to finish.
Once the repair is complete, restart your computer, open Word or Excel, and check if the applications update successfully.
Uninstall and Reinstall Microsoft 365
If standard repair methods fail, use the official removal tool to completely wipe the current installation and reinstall a fresh copy.
Switch to WPS Office for a Hassle-Free Experience
If you are tired of dealing with stubborn Microsoft 365 update errors and lengthy reinstallation processes, consider switching to WPS Office. It provides a lightweight, highly compatible, and seamless office suite that is completely free to use.
Frequently Asked Questions
Why do I get error 30045-29(1) when updating Microsoft 365?
This error typically occurs when the background Office Update service encounters corrupted installation files, network interruptions during the download process, or conflicts with third-party antivirus software.
Will I lose my Word and Excel documents if I uninstall Microsoft 365?
No, uninstalling Microsoft 365 only removes the application files. Your personal documents, spreadsheets, and data stored locally on your hard drive or in OneDrive will remain completely safe and untouched.
What is the difference between Quick Repair and Online Repair?
A Quick Repair attempts to fix minor software glitches using files already on your computer without needing an internet connection. An Online Repair is more thorough; it downloads and replaces the entire application structure from Microsoft's servers to fix stubborn errors.
