@AbrahamDUnity I confirm that i am able to install on d drive. After installing Unity Hub. I change the preferences. I set "The secondary location path". to d:\. Then installed Unity 2019.1. It installed on d drive. Only suggestion : 'secondary location path' gives the impression that it is 'the second preference'. It is actually the 'primary path.' Changing this text to simply "installation root path' or 'new installation folder' etc. would make it clearer.