When I went to bed last night, the Internet on my new laptop (running Vista)
was working just fine. Woke up this morning and have been trying to get it
to work ALL day. It shows that my signal strength is excellent but it won't
connect. Not even when I plug it straight into the router! When I try to
diagnose it I get this message: "Wireless association failed because Windows
did not receive any response from the wireless router or access point." My
PC is working just fine (as this is how I am on here posting this question).

Any idea how to fix this problem? I'm about to pull my hair out!