Carrier/rack problems of the 2003 Toyota Highlander

Passenger window has had to be fixed multiple times. Comes off the track and will not close. Have had interior damage because of it.

My daughter had parked her car at the school parking lot on 5/27/2014 at 7:02 am , she went to school stayed the whole day at school , she went to dance practice after she got out at about 3:30 pm she headed to the parking lot to go home, she said as she was approaching the vehicle she hit the alarm to open the door but the alarm did not go off, so she contined to get closer to the car and she could smell something burning when she opened the door to the vehicle a cloud of smoke came out , she started coughing and could not believe what happened , she called me right away hysterically crying couldnt even talk and she was telling me that her car had blown up , I said what your car blow up how could that be ,I could not understand what she was telling me how can your car blow up? I was like what the heck !! I told to her hang on and if she was ok I was on my way to her, I called my husband and told him and he had the same reaction as me like what?? . When I arrived to the school I could not believe what I saw the whole dashboard of the vehicle had caught on fire cracked the front window glass, melted the sun visors and the whole middle dashboard was melted completely. I had to call the police and fire I had no clue if this was going to blow up , when the firemen came they watered it down and looked at it and said that there was no foul play it had looked like an electrical fire . What coud have caused this and imagine if my daughter would have been driving the car when the fire occured.