Learn about Windows PowerShell
Summary: Use Windows PowerShell cmdlets in Windows 8.1 to update the antivirus definitions.
How can I use Windows PowerShell, rather than navigating the GUI, to force updates for Windows Defender?
In Windows 8.1, you can execute the following cmdlet and bring the Windows Defender up to date:
Hey Sean, thank you for sharing this tip. I had completely forgotten about this cmdlet.
To Update Defender Automatically , I tried the following steps in windows 8.1 64 bit. But it didn't work for me
Click START and type TASK and then click on TASK SCHEDULER
Right click on TASK SCHEDULER LIBRARY and select CREATE NEW BASIC TASK
Type a name like UPDATE DEFENDER, and click the NEXT button
Leave the TRIGGER setting to DAILY, and click the NEXT button
Leave the DAILY setting to RECUR EVERY 1 DAYS, and click the NEXT button
Leave the ACTION on START A PROGRAM, and click the NEXT button
In the PROGRAM/SCRIPT field enter: “C:\Program Files\Windows Defender\MpCmdRun.exe” (the quotes ARE required)
In the ADD ARGUMENTS enter -SignatureUpdate (no quotes), and click the NEXT button
Click the FINISH button to complete the task
Double click on the task and select from the GENERAL TAB, select RUN WHETHER USER IS LOGGED IN OR NOT, click OK and enter the password for your account.
Am I missing anything? Are there any new or alternatives steps or commands for windows 8.1, to updates defender automatically without enabling windows auto update?