Installing to second pc

.I have Norton 360 3PC version 21.2.0.38 on one machine and now wish to install on a second. Norton's instructions on account.norton.com would appear to say that I download a 'download manager' to the second PC, and that when I run that program it will download *and install* the product. I would want to download, go offline, remove the existing non-Symantec product, and then install offline (and no doubt then go back online to activate). Does the process not allow a separation of download and install? I assume it would recommend a full removal of any previous product first, in which case it looks as though I would be going online for a period without any security software??

 

Any clarification appreciated.