1)I think you can disable McAfee by opening it up through clicking on the icon at the bottom of your screen or search for it using the Windows Start search box.
I found it at this link: https://smallbusiness.chron.com/temporarily-disable-mc[product key removed]ction-54502.html
2) I don't have McAfee, but I had to turn off the Windows firewall that is part of Windows Defender virus software. Once it was off the download happened in just a few minutes.
Then I turned the firewall back on.
