Hi,
my installation is just aborting, and I do not know the reason. I tried to do this two another days, still the same problem ;/.
Verify simple things like your computer meeting the minimum requirements, you’re not having internet access issues, and that you have enough disk space not only where you are installing but wherever your OS’s temp folder is (on a Windows machine it defaults to a folder on C:). Also many people have complained of issues with Unity when connected to certain VPN services. If you are, try disconnecting and try again.
It could be problem with requirements, but I have installed unity few weeks ago. I have intrnet access ( 90 mb/s - download / 20 mb/s - upload so I think it should be enough ). Free 300gb on disk. And I am not connected to VPN.
edit: well, like unity requirements are too low to make problem on my pc.