I've been dealing with a wireless association issue with a Vista (basic) laptop, and currently have not found any documented solution (2 and 5 google hits for the error messages). First off, the issue is way beyond 'is your wireless switch on', or 'try a factory reset on the AP', etc, etc. I have installed another adapter, tried multiple APs with varying levels of security, and attempted to wipe out and reset vista's protocol stack several times.
The currently installed NIC is a broadcom, although I have gotten the same error with a brand new Intel 4965AGN. The available wireless networks display properly using the vista utility, however upon attempting association, the connection immediately returns an error, varying depending on the security used on the network. On a open-authentication network, the error reads: "This computer was disconnected from "(SSID name)" because of user action". (This message shows up after 'diagnosing the problem'). With a WPA protected network, it changes slightly: "The connection to "(SSID name)" was cancelled. This might be due to timeout or user action".
The error is consistent between multiple adapters and multiple APs. The only other piece of evidence I have is the error returned when running Winsock Fix (v 1.2), |MG| WinSock XP Fix 1.2
which displays a couple errors about not being able to load registry information, and one 'file not found' error. To me, this suggests a deep issue with the core of the networking protocol stack in Vista. I have cleaned the system of all spyware/malware, it is clean. The damage was likely incured by spyware. The simple solution is to reload this system at this point, but I don't want to accept that as a solution. There are many, many problems with the networking stack built into vista, and I'm tired of having to reload systems every time it breaks. If anyone has seen this issue before, please post anything you might know, even if it is only to add a symptom.
Thank you for your time in reading this, and I hope to generate some good discussion. Being that I've had this customer's system for a while, I'm probably going to take the easy route for now, and reload the thing; I would love to gain some advantage over Vista's terrible networking, and appreciate any advice. Let me know if I can provide any further information.