How do you get to chat support if product ID...

Question

I'm having blue screen issued from a Dell-supplied upgrade to Vista. The support page says you can chat on Vista during the first 90-days from activation. But I go to live chat and click to let microsoft scan for my product id it doesn't find it.I follow the instructions they give to manually enter it and it says it's invalid. I then try to enter product key supplied with the Vista upgrade, it's also invalid.I guess that's one way to reduce support... not validate any product idsAny help would be appreciated... I'm frustrated with blue screens and vista and I'm and IT director for a public company so I'm not your average home-computer jockey.