Fix "Windows update cannot currently check for updates because the service is not running"

Go to "Control Panel" -> "System and Security" -> "Administrative Tools" -> "Services"
(or use Command Prompt and run "services.msc" to bring up Services control panel)

1: Stop Windows Update Service.

2: Rename/Delete "SoftwareDistribution" folder.
    (Full path: C:\Windows\SoftwareDistribution\)

3: Start Windows Update Service.