1. Check Internet Connection and Reset Network Adapter
- Ensure your internet connection is stable.
- Open Command Prompt as Administrator and run:
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns
- Restart your PC and retry the update.
2. Verify and Remove Proxy Settings
- Press Win + R, type inetcpl.cpl, press Enter
- Go to Connections tab → LAN Settings
- Uncheck Use a proxy server for your LAN (unless required by your network)
- Click OK and try the update again
3. Disable VPN and Security Software Temporarily
- Disconnect any active VPN connections
- Temporarily disable the firewall or antivirus software that may block update ports
- Retry Windows or Office 365 updates
4. Configure Windows Firewall to Allow Updates
- Press Win + R, type wf.msc, and press Enter
- Ensure outbound connections for Windows Update and Office Click-to-Run (OfficeC2RClient.exe) are not blocked
- Allow traffic through Ports 80 (HTTP) and 443 (HTTPS)
5. Reset Windows Update Components
- Open Command Prompt as Administrator, then enter:
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver
- Retry the update process.
6. Enable Correct TLS Protocols
- Press Win + R, type inetcpl.cpl, press Enter
- Go to the Advanced tab
- Scroll down and ensure TLS 1.2 and TLS 1.3 are checked
- Click Apply and try updating again
7. Use Office 365 SaRA Tool for Network Diagnosis
- Download the Microsoft Support and Recovery Assistant (SaRA) tool
- Select Office 365 → I have problems installing Office
- Let the tool diagnose and fix any network-related Office update issues
8. Perform a Clean Boot to Rule Out Software Conflicts
- Press Win + R, type msconfig, and press Enter
- Go to the Services tab → Check Hide all Microsoft services → Click Disable all
- Go to the Startup tab → Open Task Manager → Disable all startup apps
- Restart your system and attempt the update