The fact the BOTH have started this at same time puzzles me....
..there is an electronic "load limiter" in each windows ...that cuts 12v feed if the motor is overloaded for some time...but that does not seem to be the prolem here.
http://www.avigex.ca/xport/pwrwindows.jpg
..I'd suspect some contact common to both windows deflects from heat under load ..... in fact the circuit breaker (thermal) is possibly out of spect....swap it with an adjacent breaker...under/behind glove box....at the convenience center.
http://www.avigex.ca/xport/convenience_center.jpg
http://www.avigex.ca/xport/convenience_photo.jpg
NOtice in my case the pwr window breaker is missing as I have rerouted the window circuit to the pwr seat circuit so it works with ign key off....
I will come with more later as 2 days ago my passenger window stopped working.....will look into that soon.....