I have identical laptops, same make/model/software suddenly

> one of them cannot connect to the wireless router (which is encryped). I
> type in the same password that is used on all my computers and it keeps
> coming back saying that there is a problem, diagnose. I diagnose, yet it
> comes back saying that microsoft cannot repair or, windows cannot connet to
> my network, or that the security code typed in is incorrect, oh yes and that
> maybe one of the adapters is not functioning correctly, so I went out to
> device drivers and compared both the laptops. The one that is operational has
> Netword Adapters, Atheros... and Realtek...(BUT) the non-connect laptop has
> one additional ..Microsoft ISATAP Adapter #2 (yet it has a status of not
> working properly) so I disabled it, rebooted computer and tried to connect
> again, again I was asked for the passcode for the wireless connection, which
> I put in and the same problems occured. So I went back out to enable the
> Microsoft driver, yet it comes back still not working problerly. For one, I
> don't understand why this driver is on the one computer yet not on the other
> (operational) laptop, they are identical in make and model and software
> installations. I didn't know if I should uninstall the 'extra' driver or
> not' it is the odd one out, and the one not functioning. I have tried
> various reboots, retyped passcode, deleted then readded the wireless network
> yet the same thing keeps reoccuring. PLEASE can anyone help.