Hello! I've got an Arduino I've happily fiddled with for over 6 mos, never observably having fried anything. Today I plugged it into my windows laptop and waited to hear the rising arpeggio (buh-duh-duh! y'know..) that indicates the USB hardware is recognized. Instead, I heard three of one low pitch in the same rhythm (as the success sound), and no acknowledgment of anything being plugged in. Needless to say I can't upload a thing. The Arduino still successfully executes the last sketch I uploaded though.
Tips? Thanks!