I've seen plenty runing Windows OS, beut nost of the time they do either have "custom" OS'* or they skin whatever they are using (no advertising. You don't pay, you ain't in the show)
As for the beeps, it'* tradition. And entertainment. Think about how "exciting" it would be to watch someone using a silent computer. Especially in a lab like that where speakers are most likely verboten, like in my office (too many computers, too much noise.)
There are programs out there, tho, that add an extra property yo each icon. You open Word, you get a noise. Yoour browser, another noise.
1998 SE Midnight Blue Pearl
Gutted airbox, FRAM AirHog, removed MAF Screen, eBay clear corners, extended brake lights
I'm so much cooler online