Hello,
Please run Windows Updates troubleshooter from Settings app > Update & security > Troubleshoot. See if it works.
If that doesn't work, try this:
Open administrative Command Prompt and type following commands one-by-one followed by Enter key.
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
Close Command Prompt and see if Windows Update works then.
Let us know if this helps, Good luck!