Dad has a really shitty Toshiba laptop (previously running Windows 10), barely uses it, but it was clearly infected with something. Weird alerts at all hours of

Dad has a really shitty Toshiba laptop (previously running Windows 10), barely uses it, but it was clearly infected with something. Weird alerts at all hours of the night over its speakers saying that a virus was detected. Has had a Norton subscription for years, but hasn't really done any good. My Dad was constantly complaining about not being able to log in (though I suspect he was really forgetting his password). Switched him over to Linux Mint a few weeks ago. I had to fight with some driver issues for the wireless card, but so far he's had no complaints.