Small things, especially non-polarized molecules, don’t get heated by microwaves much. If you try to nuke an insect it will probably just crawl around annoyingly inside your microwave.
What kills viruses in a microwave is heating something else that then heats the virus through conduction. If the virus is on an ice cube, heating it for a minute probably isn’t going to do much. On the other hand, if the virus is in a small amount of water, you can easily get the water to a temperature that will kill the virus.
As for humans, I’m not sure what to make of the OP (joke post? vast misunderstanding of microwaves?), so you get the full-on graphic description. The eyes, being delicate and not protected by thick skin, will go first. Blindness will be quick, followed by the fluid in the eyes boiling and popping the eyeballs open.
As for the rest of the body, it will be cooked like any other piece of meat in a microwave. It will cook from the inside out, from the outside in, which is a bit confusing, so let me explain. Microwaves don’t heat from the outside in like an oven does. Microwaves are radio waves that penetrate into the body and excite polarized molecules (water, fat, sugar, etc), generating heat. So the heat is generated inside the skin and tissues. That’s the inside out part. But microwaves will only penetrate so far, so the parts of the body that are more internal won’t be heated as much by the microwaves. Instead, the skin and outer layer of muscles will be heated first, and the heat will pass through conduction into the inside of the body. The person will die long before their internal organs heat up.
If you leave the body in there long enough, eventually heat from conduction will reach the inside of the body, so eventually you’ll kill all of the virus that is internal to the body as well, but it’s going to take a lot longer than a minute.
One minute is only going to result in blindness, sterilization (if male), and severe and probably fatal burns all over the skin and outer muscle tissue. The person will die, eventually, just from the severe burns and damaged skin, but the death will be the result of tissue damage, and will take many days. It won’t be an immediate death from the microwaves.
I’m a little hesitant to call that a cure.