Posted 22 August 2007 - 07:00 AM
Without more information, like what the traffic log says about it, it's hard to answer you. If you just reinstalled windows then you are starting fresh "training" your firewall. What firewall are you using?
But basically, what are you doing when this happens? It could be something as simple as a windows service "doing its thing" in the background. If it happens while online, then the alert could be normal. If you're modem is connected, but you're not actually surfing yet, it could still be normal activity. Did you just click to do something, like a link to another site, click for a download?
The general rule is, if you just clicked to do something and an alert comes up, then it's probably safe. But if in doubt, you can say "no", at least temporarily . Then if you repeat what you just did and the warning comes up again, then it's likely safe to say "yes" and then click "remember this setting" so you won't be bothered with warnings again for that particular thing.
You said your firewall is already blocking it. If you're able to do everything you need to do with it blocked, then set your firewall to always block it ("remember"), and that will get rid of the annoying notices.