Installation problem

Hello, I am Sakib. I am facing an installation error. I have downloaded unity editor 2019.4.15f1 from the unity archive. But now I am unable to install it… Every time I try to install it NSIS error shows up…Please, someone, tell me how can I fix this problem.

Is your internet connection stable? Also, temporarily disabling Antivirus and then retrying the download may help.

There could be various reasons as for why you’re receiving this error, so it’s hard to pinpoint:
https://nsis.sourceforge.io/Why_do_I_get_NSIS_Error?

I checked google and it looks like your download might not have been complete. You might want to check what I found : Redirecting.

I’m not sure how / why this happened but I rarely hear anyone complaining about incomplete downloads.