You're going to have to furnish some more information. By hearing a motor runnning, can we assume they are electric windows? If so, you are going to need to take the inside panel off in order to inspect the mechanism. Most likely, a screw or bolt has come loose and the crank gears are not meshing with the electric motor gears. But, at any rate, something needs to be repaired obviously. Now, are you mechanically inclined enough to fix it yourself, or do you need to take it to a repair facility?