Microsoft Office error code 30174‑45 typically appears during installation or updates and usually means the installer can’t download the necessary files. To resolve it:
???? Check your internet connection — Ensure you have a stable network and no proxies or VPN blocking downloads.
???? Temporarily disable antivirus or firewall — Turn off any security software that might interfere with the installer.
???? Run installer as administrator — Right-click the Office setup file and choose Run as administrator to grant proper permissions.
???? Use the offline installer — Download the Office offline installer from your copyright portal to bypass network-related issues.
???? Repair system files — Open Command Prompt as administrator and run
sfc /scannow to fix any corrupted system files.???? Clean install Office — If the issue persists, uninstall Office completely, reboot your PC, and reinstall with a fresh download from your Microsoft dashboard.
For a full, step‑by‑step guide with screenshots and advanced solutions, visit this comprehensive support guide.