With Windows 10 support ending in a matter of days, that leaves the latest Microsoft OS as the only real option for gamers right now
Windows 10 support ends in 2025. Linux is a very real option for the majority of games.
Given the idiocy in this article, I wouldn’t be surprised if it didn’t occur to them to delete Windows.old from an external software environment. Ultimately, that’s something you want to keep around for a while because it’s what lets you roll back the upgrade if there turns out to out to be problems.
You’ve already got answers about rice so I won’t comment on that.
Once you’ve noted the corroded places, clean it by using 99% isopropyl alcohol and an ESD brush. In lieu of an ESD brush, a regular toothbrush is usually fine but best practice is to adhere to ESD protocols.
The main area you won’t be able to get to is the BGA underneath some of the ICs. To clean under there, the board would need to be put through an ultrasonic cleaner.
I usually give any wet board 24 hours to dry with a fan circulating air over it, flipping the board around the 12 hour mark. Humidity is usually 30-60% where I live.