Fix ADVAPI32.dll EventRegister Error When Installing Microsoft 365
Question details
The user is experiencing a dynamic link library (DLL) entry point error that prevents Microsoft 365 from installing.
- Product
- Microsoft 365
- Device & OS
- Windows (Windows 7 32-bit)
- Scenario
- Launching the setup file to install Microsoft 365 on a PC.
- Observed behavior
- An error immediately appears stating: "The procedure entry point EventRegister could not be located in the dynamic link library ADVAPI32.dll."
Before troubleshooting, verify your exact Windows version (e.g., Windows 7, 10, or 11), as modern Microsoft 365 installers require newer operating systems and will fail on outdated ones.
Verify System Compatibility and Update Windows
This error typically occurs when trying to install modern Microsoft 365 on an unsupported operating system, such as Windows 7. Upgrading or updating the OS is required.
Microsoft 365 requires Windows 10 or Windows 11. If you are using Windows 7 or Windows 8.1, the installer cannot find the necessary system files (like newer versions of ADVAPI32.dll), leading to the EventRegister entry point error.
Press the Windows key + R, type 'winver' into the Run dialog box, and press Enter to see your current operating system version.
If you are on Windows 10 or 11, go to Settings > Update & Security (or Windows Update) and click 'Check for updates'. Install all pending updates and restart your computer.
If you are running Windows 7 or Windows 8.1, you must upgrade your PC to Windows 10 or Windows 11 to support the current version of Microsoft 365.
Use the Microsoft 365 Offline Installer
If you are on a supported operating system but still receive the DLL error, the web installer may be corrupted. Using the offline installer can bypass network and extraction issues.
Use WPS Office on Older Windows Versions
If your current Windows operating system is too old to support Microsoft 365 and you cannot upgrade, WPS Office is an excellent, lightweight alternative. It runs smoothly on older systems while providing full compatibility with standard Office files.
- 1. Download the installer: Visit the official WPS Office website and click the free download button.
- 2. Run the setup: Open the downloaded executable file and follow the on-screen prompts to install.
- 3. Open and edit files: Launch WPS Office to immediately open, edit, and save your existing Word, Excel, and PowerPoint documents.
Frequently Asked Questions
Why do I get an ADVAPI32.dll error when installing Office?
This error generally occurs because the operating system is outdated (like Windows 7) and lacks the modern system libraries (DLLs) required by the Microsoft 365 installer.
Can I install Microsoft 365 on Windows 7?
No, Microsoft 365 is no longer supported on Windows 7. You need at least Windows 10 to install and run the current versions of Microsoft 365 apps.
How do I fix a missing DLL file error in Windows?
You can fix DLL errors by running Windows Update to ensure your system is fully patched, or by running the System File Checker (SFC) tool via the Command Prompt to repair corrupted system files.
Is there an offline installer for Microsoft 365?
Yes, you can download an offline installer by logging into your Microsoft account portal, selecting 'Install Office', clicking 'Other install options', and checking the 'Download an offline installer' box.
