I get asked a lot about what causes the windows to stop 'dropping' when entering and exiting the car. They are meant to drop a little bit (about 1/4 inch) when the door is opened and then rise again when the door is closed.
There are a couple of things it could be. One is you need to re-train your windows; you do so by pressing and holding the window button down - all the way down and an additional 10 seconds. Then do the same for raising the window. The other option are the micro switches are bad and need changing. Also, a bad window regulator would need to be replaced and costs about $450 at an independent shop.
Hope this helps!