Hey. Really sorry for last question. Somedody said this to me :"Probably related to the outage, and probably very difficult to reproduce.
I once had a quite new set of speakers malfunction (woofer stopped working), and the customer support said it was probably a power surge, try unplugging for 24 hours. I said well nothing else has an issue, and I already tried unplugging it for a minute, but OK... and a day later, it worked fine. A co-worker said to me "that doesn't seem good... makes you wonder about the quality" and I was inclined to agree."
So maybe that was related by outage? But like i said i tried to reproduce this by turning off and on power cord and booting up pc,and not happened again. Windows booted normally with 144hz and not go itself to other value.
Thank you. I promise this is my last question.