Windows Defender can detects KMSAuto 2020 as a virus. All activators working as a crack. So most of them is a part of the anti-virus blacklist. Before downloading and activating, simply disable all anti-virus programs, or add the KMS file to the exceptions of your anti-virus. If you are using Windows 10, then you need to disable the Windows Defender to use KMS otherwise it will delete it. After successful activation, don’t forget to turn on everything again.