Problem
Received error 8024402C when attempting to run Windows Update on a server running Windows Server 2012 R2.
Solution
Issuing the following commands in a cmd prompt using the “Run as administrator” option resolved the issue:
wuauclt /detectnow
wuauclt /resetauthorization /detectnow
wuauclt /reportnow
Note that no messages were displayed after issuing each of these commands.
Follow easy steps in the below mentioned link, if you are facing problem with windows Update-
http://www.grishbi.com/2015/07/windows-server2012-windows-update-fails-with-code-8024402c/
Thank you! – that seems to have worked for my failed Sharepoint Sp1 update On server 2012R2 running in a Hyper V VM.
FYI- my error message was 80200056.
Also found this error on a server who had no gateway configured.
check internet settings or dns resolve