Aways been up there, worth having Sir.
A firewall i would defo have as mr admin sir po writes, although most have one in their router nowdays which does most of the work.
The other big risk is clicking on a shady link which it seems just about every browser and os which everyday bods use is in greatest danger.
Its just as much about what you link to or download to your pc as the software you use.
One question Dom sir how long do you get updates for?