Windows Defender Application failed to initialize: 0x80070006. The handle is invalid.

Just got this error today when I wanted to run a virus scan.  I'm pretty sure I don't have any other antivirus software or anything of the sort on my computer so I don't think it's not a conflicting software causing the issue and I haven't installed anything new on my computer in quite a while.  Any ideas?

Question Info

Last updated May 29, 2018 Views 5,201 Applies to:


Did you make any software or hardware changes on the computer prior to this issue?

Let’s follow these methods & check if the issue persists:

Method 1

You may check for the status of “Windows Defender” service and ensure that it’s started and running.

a. Click on Start.

b. Type “services.msc” in the Start Search box and hit Enter on the keyboard.

c. Double-click on Windows Defender.

d. Under Service status in the General tab, click Start to start the service.

e. From the startup type dropdown menu select Manual.

f. Click on Apply and OK.

Method 2

If you have recently upgraded to Windows Vista, you may follow this link:

Error message when you try to start Windows Defender on a computer that you recently upgraded to Windows Vista: "Application failed to initialize"

Hope the information helps.


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