To fix Office Error 30145-13, run Microsoft's Support and Recovery Assistant, free up 10-15 GB of disk space, temporarily disable your antivirus,…
Before troubleshooting, confirm your PC actually meets Office's minimums.
If you installed Office through the Microsoft Store, the Store's own cache is a frequent culprit.
If you're on a corporate or campus network, a proxy or firewall is a likely suspect.
Office install errors look interchangeable but they aren't, and confusing them sends you down the wrong path.
Read the complete breakdown, fixes and what happens next.