1. Is Norton easy to remove? Do I simply uninstall?
Norton is one of the programs that leaves visible traces ( like most programs ), though I don't have Norton myself, so I can't state how easy it is to uninstall.
2/3. Can I rely on VISTA firewall and antivirus?
the Vista Firewall is upgraded from XP ( Which was only one-way) and is now two way, so you should be able to rely on that. ( If you are paranoid and feel that you need a better firewall, I suggest one from
COMODO. )
What antivirus are you talking about? Windows defender? If so, no - it's not even an anti-virus. I suggest you download
AVG, which is an easy-to-use and
FREE AV.
Then, remember to have a couple of anti-spyware programmes. Windows Defender may work, but I recommend
Ad-Aware and
SUPERAntispyware.
( Yes, two at the same time )
Hope that enlightened you a tiny bit.
