Window won't roll up???

Does anybody now what that does to fix it? Not like it matters but it would be nice to know.

you need a power window motor. It does matter because one of these times the banging on it/ slamming the door method will not work.. We do that at work to get the window up then we pull the plug on the window motor so the customer does not roll it down again ( if we don't have the motor in stock)