Window problems

[Msw-986]

Hi all, hopefully someone can give me a clue as to where to start looking.
Boxster windows today, for the first time, won't go all the way up. They stop going up at the point where they drop down to put top down. I cycled the roof up and down to see if that corrected anything and it did not. Then randomly, while driving around, the drivers window would go down on its own, then, the passenger would as well. I'm assuming its a switch somewhere for the convertible top keeping them from going all the way up. Any other ideas? Assuming a switch where nd or what one should I look at first?

Thanks

Shawn