Yeah... definitely sucks anytime it happens to anyone. Unfortunately, part of the game.
I started suspecting the cable more and more, so I was just trying to see if twisting it around any certain direction, or putting pressure on it in any direction helped. Well, funny part is that it did. Twice. Same results both times. Pulled it down tight on the screen so it was folded over the plug, and everything was perfectly normal. If I left it plugged in and moved the cable though, it would lock up the computer (like yours). If I had it any other way when I plugged it in, I got "Device not found".
And now, it will plug in and charge and I get "USB Connected" in the drop down, no matter if it's plugged into the wall or computer. That's probably not good.
At least I have insurance, just in case I did break it.... I'll find out in a few hours when my brother wakes up.