I think we are protected because i installed my full version of Norton Internet Security 2003 on my TR and i’ve never seen an attack (while i use to receive between 5 and 20 attacks / hour to the pc connected to a dsl line(mainly scans, so that’s not that dangerous) ... but i keep it for when i’m on an untrusted company network or on a public hotspot ...
Anyway, you still need Norton Antivirus on your laptop (or any other antivirus) since a virus infection will go through your firewall installed on your desktop and will damage the softwares installed on your vaio. Same for the emails, if you read your emails on your vaio and one is infected, without a trusty antivirus, your probably good for any kind of system restore methods… Or if you received any cd / dvd with viruses on it…
Summary :
- Norton Firewall : I think it’s not required if you don’t use your vaio elsewhere than just connected with your protected desktop.
- A trusty antivirus : essentials !
Hope it helps !