Check for your psu in this list:
https://linustechtips.com/main/topic/406160-psu-ranking-and-tiers/
If it's missing, welp I would trust the reviews but remember that you never want to compromise on your psu no matter what.
You've likely got a handful of background apps running. Head over to settings>privacy>background apps and disable the apps that you don't want running in the background.
I made the stupid mistake of deleting the usb driver once and ran into a similar issue. This was a while ago, but if I remember correctly, you'll need to boot into safe mode and then go from there.
Sorry I can't be of more help. Hope this helped a little.