Microsoft Office error 30045‑44 typically appears during installation or update when setup files are missing or corrupted. To resolve it, ensure a reliable internet connection and try downloading the installer again; then right‑click it and choose “Run as administrator.” If the error persists, temporarily disable antivirus or firewall software that may be blocking the process. Next, open Command Prompt as administrator, run
sfc /scannow to repair corrupted system files, and then restart your PC. If problems remain, completely uninstall Office (using Microsoft’s uninstall tool if necessary), reboot, and reinstall with a fresh download. For full step‑by‑step instructions, check out this detailed troubleshooting guide.