MS OSs are well documented phoning home. You firewall should be able to block the obvious ones. The ones that don't play by the rules require an external firewall/filter. IPchains is a rulesbased firewall that you can configure on an old box running linux to catch EVERYTHING.
Ive heard of that... can that stuff be ran on an old 100 mgtz pentium with like 8 megs of RAM? I have one in the garage...
you bet! a good distribution for old slow computers is slackware found at www.slackware.org it is time for us all to learnhow to use other OSs instead of always MS.