1. On the desktop computer you need to access the router’s set up details. This is done in a home network by typing 192.168.x.y into a browser address bar window. The values of x and y depend upon the make of router. If you don’t know the values, open a Run window (Windows key+R), type cmd /k ipconfig (note the two spaces) and press Enter. Make a note of the Default Gateway address and enter its value into the browser window. When asked for the username and password, type the default values (if they are not known, look in the router’s user manual). Go through the sections until you find one where you can enter your ISP details, i.e. the username and password given to you by your ISP.
2. To set up wireless access, look for a section named wireless or similar wording and find an SSID (Network Name) and a Security key. Perhaps change the SSID to something more meaningful to you but don‘t use obvious names, like your name. Also, if the key type is set to WEP, change it to one of the more secure WPA settings, unless there are computers with older WEP-type adapters that need to connect. Now change the Security key and make a note of it and the SSID. Save the changes and exit.
3. Your router may have a section that allows you to backup and restore its configuration details. If so, make a backup to enable you to easily restore the set up in the event of having to reset the router to factory settings.
4. The SSID and Security key are needed for any wireless computer to connect to a router. The software varies from manufacturer to manufacturer, but generally it involves right-clicking the wireless network adapter’s icon in the Notification Area (bottom right of screen) and following the prompts to create the connection.
5. Post back here when you have decided whether to buy a wireless printer or a printer connected to the desktop computer.