Proper way to install norton in a new com ?

my dad planning to buy a com + a additional nis 2009 for me…i know that inside the com, there is kaspersky preloaded…ok…if i buy the com…

should the steps be like this…

1st -> with no internet…uninstall kaspersky in control panel

2nd -> take out the norton 2009 and install it…

3rd -> when its done…plug in and do live update immediately…( oh…is my com vulnerable during the 30 - 1 min sec of live update and plugin )

4th -> install all microsoft updates and i’m ready to go

And yea…the com i am buying only has the CPU … i gonna use my old old OLD com’s monitor…speaker…keyboard AND mouse…
if i remember correctly.my old com…has like TONS of viruses…ok…maybe not the keyboard and mouse…but the monitor and speakers…will the virus get spread through using the monitor anc the speakers ?

greatly appreciate your answers