Sounds like you will have to go into manage wireless networks from here you should be able to see any networks you have joined in the past.
If your network does not broadcast ssid you will have to configure it manually to do this you will need to have the credentials for your wireless AP.
you should also make sure your wireless discovery is switched on in advanced file sharing
Finally if you are asked for the password each time you to log on this means you need to configure the way you log on to your network in the security set-up for that network
Have you considered have somebody help the through a remote desktop ? this maybe another option for you something like teamview would be fine