If you're managing Windows Servers 2012 R2 and having issue running the Automatic Windows Update continue reading it might help you and save you time searching for a solution. I check my servers every week to make sure all security updates is applied to keep my servers protected against malicious users. Wham! the windows automatic updates are not working and an error occurred showing Error Code 8024402C as depicted below. KING.NET.WindowsUpdateError.8024402C This is actually a quick fix if you know where to look. Here's how to . 1st step , run regedit and go to HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\AU and update the value of UseWUServer from 1 to 0 . KING.NET.Windows.Regedit Double click on UseWUServer and change the value to 0 . 2nd Step , restart windows update service. Run Services.msc KING.NET.WindowsUpdate.RestartService That's all. Now run Windows Update again to check for security updates.