Windows update is disabled by administrator

Windows update can't  check for updates because settings on this PC are controlled by your system administrator

To disable this option

Open Registry Editor

Navigate to key path 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

now look for nowindowsupdate key and change its value to 0.

Go back to Control panel and check on windows update, it should be back to normal now.

This fix works on Windows Server 2012 R2