On Windows Server 2019, I wanted to switch off Windows Defender Anti-Virus realtime scanning to test something. I went to "Windows Security" and then cliecked on the "Open Windows Security" button. This brought up the following error message: You need a new app to open this windowsdefender After some searching, I found that you need to install the missing app yourself, it seems to be a bug in Windows Server 2019. To do this, open Powershell as Administrator and type (all in one line): Add-AppxPackage Read more [...]

After installing Windows Server 2019 Standard, I tried to activate it with a MAK key from the Microsoft Volume Licensing Portal. I clicked on "Change product key" and entered the key from the Microsoft Portal. I got the following error message: The product key you entered didn't work. Check the product key and try again, or enter a different one. (0x80070490) Searching on Google, this error number mostly refers to Windows Update or Windows Store errors, but not to licensing issues. I finally Read more [...]