Advice on water leaking into my windows, suspected from the roof

[pilotman14]

Hi my tenants have reported a leak from the window at the top of the frame, 2nd floor. Also on the ground floor window as well, as circled on the image. I think it might be coming from the valley or something but not sure.
I should have a roofer going to look at it tomorrow, but want to make sure if my suspicions are correct and if anyone can enlighten me as to the cost of such repairs.

I originally thought it was a window seal until they reported it on the ground floor window as well

Cheers

 

[blup]

You've changed the gutters (black to white in the pics or vice versa) so maybe problems related to that or the recent heavy rain tracking to the windows, which the tenants left open or other sealing failure.

Blup

 

[pilotman14]

You've changed the gutters (black to white in the pics or vice versa) so maybe problems related to that or the recent heavy rain tracking to the windows, which the tenants left open or other sealing failure.

Blup

Thanks, my suspicions as well. Roofer went around and said nothing was wrong with the roof. So going to get new windows put in anyways so hopefully that will solve it. Think think the windows are 25years old so seals must have fails in the heavy rain.

Cheers