Help with trojan

Ok i have a problem it seems. My sygate firewall pro 5.5 firewall tells me Explorer is trying to connect to [url]www.spylog.com[/url] ? while im on the net browsing. If i click yes and allow it access my browsing seems unchanged. When i block the ip of [url]www.spylog.com[/url] in advanced firewall settings my browser no longer works.
I have scanned with trojan scan [url]http://www.trojanscan.com/[/url] & Adaware pro , spybot etc but no luck.
Do i have to re-run windows again :) that will be the third time this month.
Also can someone tell me how to mask my ip while browsing web sites. Might stop half the troubble i seems to get ?

[url]http://www.broadbandreports.com/faq/8428[/url]

Thanks very much