Good Evening ! A topical issue...I just finished auditioning over the past three months Private Firewall...P.C.Tools Firewall Version 7...and Sunbelt's Premium Firewall which is integrated as a suite component with it's Vipre Premium Suite...and the winner is Windows 7. Runs like a top with my Avast Pro Anti-Virus and Prevx 3.0 with Safe On Line. In all fairness, in my opinion they all performed extremely well with Windows 7. It's a great time for consumers everywhere...so much choice...and quality. Take them all for a test ride. Enjoy! Sincerely...Zron