With the strong wind in their favour the Ducks scored what was to be the winning goal on 10 minutes when Harow keeper Hassell was slow to react to a cross and Dwain Clarke clipped the ball over him and into the net.
The Ducks had chances to increase their lead as the half progressed. Clarke hit the bar direct from a corner whilst the returning Enzo Silvestri had a long-range effort fly wide.
Harlow had a number of chances themselves throughout the second half as they enjoyed the luxury of having the wind in their favour. Their most notable chance saw Martin Young fire over from close range.
Determined not to lose two vital points Aylesbury finished the stronger as Hassell saved superbly from Chris Bangura whilst Kieran Knight had a shot go just wide.