I just got a Windows 10 laptop and it saw the WiFi from my AT&T router so it got on the Internet fine. But I notice that it also sees my desktop computer there, which has a CAT5 cable going into theAT&T router, so I guess that puts the desktop machine on the same network as the WiFi devices connecting to the router. But if I click the desktop computer icon on the new laptop, it asks for a username and password to connect. It's been years since the desktop was set up and I don't know the username and password. Is there a way I can get this from the desktop machine, itself, which I can log onto from the keyboard as an Admin user?