Jake Smith's goal in the second period proved to be the winner for the Spitfires in a 2-1 win in Peterborough.
Windsor is now 20-13-3 on the season.
Curtis Douglas had the Windsor other and another new player, Cody Morgan added an assist.
Cole Fraser replied for Peterborough which held a 33-26 edge in shots on goal in the contest.
The Spits are in Kingston tonight and in Ottawa Sunday afternoon.