I’m not OP or the right person. Wrong recipient lol. But info was noted for my own use.

Easy to miss typing in a hurry too. I just did it above.

Windows is gonna Windows. Even if you did track down the issue your one update from a borked system or square one when they alter the setting and relocate it on their own accord.

Major issue lol short circuit or too thin of wire/breaker, old house probably. Instant dim and back to normal turning on a heavy appliance can happen as the power circuit lags but it’s a mere fraction of a second.

So to turn on an appliance I’m pretty sure it takes 3000 watts to cycle on then reduces to say 1500 watts to operate a normal 1500w appliance. Nothing should ever continuously dim lights. Major fire hazard if so.

Fail safe. It’ll trip the power before it hits the wall and burns the house potentially limiting a fire or containing whatever did happen.