Hmm I just noticed this article from last year has a perfect rating from over 40 users so it must be both pretty good and very useful. So here it is again:   - Gizmo

"So, you just got a new device – a PC, a tablet, a smartphone, what have you- and you want to connect it to your wireless network at home. That means you have to know the password for the router. Unless you wrote it down somewhere, that probably means retrieving the password from a device that is already connected.

(Some routers have a WiFi Protected Setup button for automatic connection but this article is for those who do not have that feature on their router.)

There are several ways to obtain the details of a wireless network in a Windows system. You can always open settings in the Windows Control Panel but the method for finding the wireless settings is somewhat different in different versions of Windows and can involve a number of steps. There are two other approaches that apply to Windows 7 through 10 that I find easier, especially in Windows 8.1 and 10." Read More