2007 Kia Sportage dead battery

Had a dead battery and our daughter-in-laws brother jumped the car. He put the cables on wrong and the brakes windshield wipers heater fan blower and power windows stopped working. Replaced computer twice and now everything works but power windows and heater fan blower. What could possibly be wrong now?

Should not have effected the brakes at all. Find the fuses for windows and blower fan and replace them . It might be that simple.