Zund HD cant "be read"

[Bacon Man]

My Zune seems to not be able to connect to my computer, internet, or marketplace. I've tried holding down the power button and the power + media buttons to reset it, but the problem persists . My computer only gives me an error message when connected that says important files cant be read. Also , when i open the internet , my zune freezes and tring to connect to a network just sits there "connecting". Any help would be gladly appreciated!