Create a schedule task for Windows Defender definition update on Windows 8.1

Hourly

schtasks /create /tn "Defender Definition Update" /sc HOURLY /ru SYSTEM /rl HIGHEST /tr "'C:\Program Files\Windows Defender\MpCmdRun.exe' -SignatureUpdate -MMPC"

 

 

Every 4 hours

schtasks /create /tn "Defender Definition Update - every 4 hours" /sc HOURLY /mo 4 /st 00:00:00 /ru SYSTEM /rl HIGHEST /tr "'C:\Program Files\Windows Defender\MpCmdRun.exe' -SignatureUpdate -MMPC"

 

 

Reference:

http://superuser.com/questions/546030/scheduling-silent-hourly-windows-defender-definition-updates-using-task-schedule

https://technet.microsoft.com/en-us/library/bb490996.aspx

http://answers.microsoft.com/en-us/protect/wiki/mse-protect_updating/microsoft-security-essentials-update-faq/096ed345-2669-4143-9d45-d6ca0e03ac4f

http://winaero.com/blog/how-to-change-the-windows-defender-update-frequency/

https://en.wikipedia.org/wiki/Windows_Defender

http://securitygarden.blogspot.hk/2012/04/understanding-microsoft-anti-malware.html

http://grandstreamdreams.blogspot.hk/2013/11/microsoft-security-essentialsdefender.html

http://www.winhelponline.com/blog/updating-microsoft-security-essentials-using-command-line/

http://fixitscripts.com/problems/microsoft-security-essentials-update-scan-script

https://blogs.technet.microsoft.com/heyscriptingguy/2010/05/16/hey-scripting-guy-weekend-scripter-scripting-microsoft-security-essentials/

https://gallery.technet.microsoft.com/scriptcenter/MSE-update-with-powershell-9aff38d1

https://www.winhelp.us/configure-windows-defender-in-windows-8.html

Create a schedule task for Windows Defender definition update on Windows 8.1