Windows 10 Missing Norton, no Solution

Hi, I've upgraded to Windows 10 and my Norton Internet Security has disappeared.  I've checked the threads and none of them offer a solution that works for me.  I've already gone to the I cannot find my Norton product after upgrading to Windows 10 page:

 

https://support.norton.com/sp/en/us/home/current/solutions/v113033802_EndUserProfile_en_us

 

and none of the solutions work. I tried the instructions in Install the Norton Product Manually section, but double clicking on the "upgrade.exe" doesn't do anything at all.  I've tried right clicking and choosing open and also tried Run as Administrator and it still doesn't run.  I've tried logging into my Norton Account and just re-downloading it.  I get the following error code though

Error ID: 387d2563-0f5b-43de-a108-b7ae3814feab

Any help gratefully received please.