Unable to Activate/Run Unity

I just installed the latest version of Unity, and I’m unable to activate it. I try the internet activation, and it comes up with an error message and tells to manually activate it. I’ve done all the steps in the activation, up to the point where I submit the license file to the manual part of the website, and it gives me unitylicense.ilf. I’m unable to do anything with the file past this point, and I’m unable to click the Finish button to finish activating Unity. How do I get past this?

Try running Unity as Administrator, Or make sure your Internet browser isn’t using a proxy, i had a error like that once but i fixed it by doing that