1999 Buick Regal • 160,000 miles

When car starts sometimes the radio and windows dont work. If from the off position I turn the key to on before it starts I get power back to both, but once I actually start the car I lose the radio and window power again. Other times I will start the car and everything works fine but not too often and sometimes radio/window controls shut down after a few minutes. Also if its related, from time to time I will get in to start and get nothing for which I have to wait 3 minutes or so and it starts fine like it has to reset or something. This happened for a month and currently starts fine every time, someone please help !
March 20, 2013.

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