The fact that the windows, radio, etc. stop working when the fault occurs is screaming BAD KEY!!!!! Sounds like your key isn't completely transmitting data to EIS shortly after it's switched on. As far as the rest of the car is concerned the key might as well be in your pocket. That's why certain accessories aren't working. Bring your picture ID, title and registration to your dealer, along with about $250 and buy a replacemenyt key. You still may end up replacing the EIS but start with a new key first.