There is no scientific evidence to support the claim that lining windows with aluminum and grounding it to the mains ground can redirect microwaves aimed at affecting individuals negatively. While aluminum can reflect certain types of electromagnetic radiation, such as radio waves, it is not an effective barrier against microwaves.
Microwaves are a form of electromagnetic radiation with relatively long wavelengths. They are used for various purposes, including telecommunications and cooking. If you are concerned about microwave radiation, it is more effective to focus on reducing exposure by keeping a safe distance from microwave-emitting devices and using them according to manufacturer instructions.
It's important to note that perceptions of improvement or positive results may be subjective and influenced by a placebo effect or other factors. If you have any concerns about your health or exposure to electromagnetic radiation, it's always best to consult with a qualified medical professional or expert in the field.