windows going down on their own over night on 2010 Honda Accord

I went outside to shovel snow and all the windows were all the way down and the sunroof was open all by themselves. My car was full of snow! What a mess! Brand new car full of snow! Why did this happen?

Asked by for the 2010 Honda Accord
It happened to me as well this morning- but I have a 2011 BMW 328xdrive. Somebody help!