And the hits keeps coming!!!!!

The battery is three years old. I had it and the alternator checked and both are fine.

An hour ago, I took the battery out and cleaned the terminals and I checked the other end for corrosion and it's fine. I put the battery back in and started the car without any hesitation. THE PROBLEM NOW IS THAT MY WINDOW WON'T ROLL DOWN!!! I checked the fuses and they're fine. Now I know why I'm not a mechanic by trade. I'd go hungry.