For users who are still using WinXP, which one of the following software firewalls would be better? Comodo Firewall Outpost Firewall Pro Spyshelter Firewall PrivateFirewall Here I only list some firewalls which have HIPS modules, and have not been abandoned by the vendors (I am not sure whether PrivateFirewall is abandoned, but since it still supports Win 10, I assume that it is not abandoned). Some other famous firewalls, such as ZoneAlarm firewall, Tinyfirewall, LnS, Online Armor, etc, are not listed here, because I think they may not satisfy either of the two requirements mentioned above. Please correct me if I make a mistake here. I hope you can evaluate these firewalls listed here in terms of not only security, but also the stability and the impact on the system and connection speed. It would be better if you could share some HIPS rules / Firewall rules that you think is important for XP users. Thank you.