This assumes that the new ones will not be vulnerable, which is probably not a good assumption :)
You might want to just install a personal firewall and shut off most services you don't need/want (almost everything for most people).
ZoneAlarm, Sygate and BlackIce work reasonably well. Just don't get excited and start complaining to ISPs when you discover your system is being probed a lot... waste of time usually.
If you have a firewall, things like this are pretty much moot. You also might want to consider using a filtered ID from spamcop.net or hushmail.com rather than using your ISP... they run $30 a year and provide virus and spam filtering.