First of all , the reaosn I was trying to install this version is because the lightroom doesn't display the raw files from Nikon Z6 -2 . Windows Explorer can display them and also photoshop with CameraRaw 13.4 .
If I can solve this issue without upgrade to LR 10.4 , Its good enough for me .
I tried to install AdobeDNGConverter_x64_13_4 but I get an error that the OS is not supported .
If I tried to install 10.4 from Creative Cloud Desktop I get a message that I need to update my system and below this it says - Please update your operating system Windows 10 (version 1903 or later) .
But I have Windows 1903 or later
My Display Adapter suppports DirectX 12 and has 4 GB RAM