I was having an issue with connecting to my wifi router since yesterday; could see the router in the wireless networks available but the router was not authenticating my password.

I tried unblocking the hardware switches though non was blocked.

Finally on discussing with the ISP i gave a re-installation of the wireless driver a try; and to my surprise that worked.(I was assuming faulty wifi router).

So as per the subject of the question; I am very curious to know what actually happened that prevented me to connect to my wifi. Any logs that I could see to confirm the cause of this suspicious activity.