Cubase LE 10.5.20 Installer not working


I have downloaded Cubase LE 10.5.20 which I got from buying the Zoom H1n recorder.
I had to download it twice since once downloaded the programme still did not recognise that I had all the files. Then, clicking on the Setup.exe it actually doesn’t install the programme but tells me that “the destination file cannot be created”.

Am I missing something? I have downloaded and installed and activated WaveLab no probs…

Thank you!