I have perfectly fine WiFi and I can download other programs, but I have been having trouble with Unity. About halfway through downloading the file will stop downloading and say “incomplete or corrupted download file.”
I have tried reinstalling unity hub multiple times. I have also tried only downloading the editor without installing modules or Visual Studio.
Additionally, I have also tried downloading Unity from the archives page.
I am not sure why this is happening. Any suggestions would be great.
Make sure your windows/mac is up to date. Im sorry thats the only thing i can think of. Otherwise your computer may not be able to run unity at all.
You can download the complete unity application by selecting “Unity Editor” under “Windows” on the Archives page. 
Hope that works.