Disable firewall, antivirus, VPN, or proxy temporarily
Uninstall previous Office versions using Microsoft’s support tool
Delete Office temporary files from %localappdata%MicrosoftOffice and %temp%
Download the latest Office installer from your copyright
Right-click the installer and choose "Run as administrator"
Repair Click-to-Run via Control Panel > Programs > Microsoft Office > Change > Repair
Use a new local admin account if the issue continues
For complete instructions, refer to this Office error code 30180‑4 fix guide
Windows Update error 0x800B010A indicates the update signature is invalid or untrusted—usually due to outdated root certificates, corrupted update cache, or a blocked component during download. Here's how to fix it:
- Disable any third-party firewall, antivirus, VPN or proxy temporarily
- Run Settings → Update & Security → Troubleshoot → Windows Update to detect and fix issues
- Open Command Prompt as Administrator, then run:
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
- Still in the same window, stop services and clear the update cache:
net stop wuauserv
net stop bits
ren %windir%SoftwareDistribution SoftwareDistribution.old
ren %windir%System32catroot2 catroot2.old
net start wuauserv
net start bits
- Ensure your computer can retrieve up-to-date root certificates—stay online and let Windows install them automatically
- Restart your PC and check for updates again
- If the error persists, create a new local administrator account and run Windows Update from there
For the complete walkthrough, check out this Windows Update error 0x800B010A fix guide.