I just had this problem on a customer computer ("Windows association
failed due to an unknown reason"). It is a Toshiba Satellite L-305 with
a Realtek RTL8187B card (which claims to be a USB 2.0 adapter), BTW.
Uninstalling the wireless card driver, (not deleting the file, of
course) then doing a scan for changes and letting Vista automatically
reinstall the driver, that fixed the problem.
So you might try uninstalling and reinstalling the driver.
--
LC 475
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