1.Make sure that your server connected to the Internet and firewall doesn’t block Windows update service port and address.
2.Turn off Proxy
3.Change your network DNS
Preferred DNS server: 18.104.22.168 and/or 22.214.171.124
4.Reset windows update components
Right click on the start button and select Powershell (admin) or Command Prompt (admin)
Write the next hit enter after each line.
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
After completed, restart computer and check for updates again.
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