No, microwaves do not typically leak through doors and windows when they are turned off. Microwaves are designed with a metal mesh screen in the door and window panels to contain the microwave radiation within the cooking cavity. This screen acts as a barrier, preventing the microwaves from escaping.
When a microwave is turned on and in use, it generates microwave radiation to heat the food. However, this radiation is contained within the microwave oven itself and does not leak out through closed doors or windows when the oven is properly functioning.
It's worth noting that microwave ovens should be used according to their instructions and should not be modified or damaged. Damaged doors, windows, or seals could potentially result in microwave leakage, but such cases are rare and not typical of properly maintained microwaves. If you suspect that your microwave is malfunctioning, it is advisable to have it checked by a professional to ensure it is safe to use.