In fact, hide the "Defender" icon in the Windows 10 Crater Uprate tray is fairly simple, but few know it...
If you do not know, then the "Protector" icon that is displayed on the taskbar is located inside the executable itself, called "MSASCuiL.exe", and this file is located in the following path: C: \ Program Files \ Windows Defender. Accordingly, this file is automatically launched every time the operating system starts. Therefore, we remove the file from the automatic download and as a result, get rid of the bad icon we do not need.
We open the "Task Manager" and go to the "Startup" tab, we find the "Windows Defender Notification icon" entry and click it on the PCM, then select "Disable" from the context menu. 
It remains only to reboot the operating system in order that all the changes you made to it fully become effective.
In this tricky way, you managed to hide the "Defender" icon in the Windows 10 Crater Uprate tray so that it was not displayed and did not bother you again. If, under some circumstances, you need the "Defender" icon again, simply perform the above process with an accuracy of one revolution and everything will be completely and completely restored.
