Windows 10: How invoke Windows Defender?

We cancelled our McAfee security. How invoke Windows Defender? We are on WIN 1803 version.

Do I need to uninstall McAfee?

:)

 

window defender

• • • 
      You will want to print these instructions for offline reference -
      

IMPORTANT => DON'T SKIP ANY STEP perform all Steps in one uninterrupted session - If a Step says to reboot
reboot.

Problems starting Windows Defender in Windows 8/8.1/10

Pləase let us know what fixes the problem or if the pяoblem remains.

• • • 
      `~`
      

 

Windows Defender problem

Hi Ernst,

To troubleshoot this issue, we suggest that you check the Windows Defender service if it's running. If you are using a third party spyware/malware program, it may disable the Windows Defender service. To do this, please follow the steps below:

• Press Windows + R key.
• Type services.msc.
• Right-click Windows Defender service and click
  Start.

Let us know the result.

 

invoke

• I have a Motorola, running Android 7.0. The Cortana app was installed by a service advisor in the Microsoft Retail Store in NYC where I purchased Invoke.
  
• We specifically stated that Invoke was going to be used in Spain. We were told that we would need to use English to talk to Cortana, but the service advisor did not have any concern regarding geographic location.
• Back in Spain, Cortana worked fine. Invoke also worked fine, although it once needed to be resynchronized; this was done without a problem using the Cortana app.
• For unrelated reasons, the phone needed to be reset. When we try to reinstall the Cortana app from the google play store, we consistently get error DF-DFERH-01
• Trying to use a Windows 10 laptop to setup Invoke again, we upgraded it to the Fall Creators Update. Unfortunately, our Windows 10 Spanish speaking Cortana does not show a "Devices" icon nor understands us when we type "Setup my Invoke"

We were happy users of Invoke and Cortana, but are now unable to use them now.

Thanks for your time