Press W+R Keys to open Run menu.
Type services.msc and hit the Enter key.
Locate "Windows Update" service
Set it to "Automatic" and is running.
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Open Command Prompt as Administrator and copy-paste the following commands:
net stop wuauserv
net stop bits
del /f /s /q %windir%\SoftwareDistribution*
net start wuauserv
net start bits
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Run Windows Update troubleshooter.