2001 Chevrolet Camaro Car electricity

Good day, my issue is as followed:

I believe there is an electrical problem with my car since, at times my car stereo and power windows suddenly stop working and go back to proper working conditions after a couple of seconds/minutes.
The thing about it, is that the two things always (short out I think is the proper term) at the same time, always! And as mentioned, they suddenly short out, then go back to normal, and short, and continue this routine, for at least a couple of minutes (it is quite annoying), and perhaps, after 5-10 minutes, all is well, and my whole ride is never again interrupted. Until I turn the car back on, and the horrid experience begins once more on the wya back.