Did some reading up on this and went back to device manager (this is where you can enable and disable the hardward, of course, for this PC). Weird, but when I "disabled" then immediately "enabled" it, it worked! Same thing must be done if I power it down, but at least I know how to get the internet to work on it again!
YAY! We have our fifth computer in the lab (and much needed) working again!