Cant access websites due to Windows Firewall SPF

When I try to get some websites, I get message "Ad blocked here by SPF", which I believe is Windows Firewall, Sunbelt Personal Firewall. How do I get round this & still retain Firewall protection. I am using free trial Nod 32 Anti Virus, bit it has no Firewall. I am using Eircom broadband.

Windows Firewall and [broken link removed] are not the same thing. You may need to tweak the firewall settings but if you don't know what you're doing then get advice from somebody who does. Personally I always disable the Windows Firewall and have recently switched to Comodo (free version) from ZoneAlarm (free version). I also run Firefox (with a few extensions for blocking certain content) rather than Internet Explorer.