NRnR Tool download times out - reason FTP?

<<NRnR Tool  download times out  - reason FTP? >>

Comcast residential is my internet provider.

Was trying to install Norton 360 on my 3 Vista machine and 2 Windows 10 machines..  Successful on 4 of the 5 computers and each time, the installation of Norton 360 automatically initiates removal of existing Norton Security.

On the 1 machine (Vista) with NIS v17.xxx , downloading and installing Norton 360 stalled and warned that I had to manually remove previous versions of NIS.  Tried to do so with control panel remove programs, but that didn't take care of it.  Norton help said I must run the Norton Removal tool or they could remote connect to machine and do it.  I balked, confident that I can help myself.

I went to Norton site to download the Norton Removal Tool and encountered a time out (I noticed that it had re-directed me to FTP something symantec)

a. What is the cause of blocking this attempt at FTP connection? 

b. What should I try next?

c. Should I surrender to Norton and do a remote connect?  <<always scares me>>

Embarassed near Seattle.