Screwed around with wireless network settings - now critical errorrs on startup!

[Hooobi]

I was screwing around with my wireless network settings on my laptop, trying to see what other networks were available at a new location, and all I did was select the option to log on non-wep networks and then select a network to connect to.

This was followed almost immediately by a critical error message, and now I get that same msg on startup.

I even tried reverting and still get the same error.

Win XP Pro

It's a fairly new laptop, so I'm considering wiping everything and starting over, but would prefer not to have to waste so much time.

Any advice appreciated.