I am setting up a laptop for my son. If I install Bt Netprotect + it will no doubt work (update and protect) when he is connected to our home network. However will the software still update and protect the laptop when he is on the move? In particular, his flat has BT Broadband, will the laptop update and protect on this network or will he have to re-install BT Netprotect +?
Yes it will work and update regardless of where he uses it.
Having said that my advice would be not to use BTNetprotect. It can cause problems on some computers and is a resource hog.
Have a look through the forum for problems and do a search of the Internet for reviews. It is basically McAfee Antivirus and gets poor reviews. There are far better free antivirus programs such as Avast Free and AVG 2015 Free.