Quote from MajorUrsa:
Not at all. It has been shown that if you install eg. a year-old version of XP and you connect it to the net with open ports, so no firewall, it will be infected before you can even download all patches and upgrades to prevent the infection in the first place.
It's not a 'someone' doing tghis, it's a computer that has nothinge better to do than scan all existing ip-numbers for open ports.
It's an average of course, and depends on which ip-set you belong, some are easier scanned than others, and some isp's close ports to prevent his, but still, it is not unlikely at all. Always use a firewall.
Ursa..
Possible, but so is being struck by lightning.