|A router doesn't need any software for it to be installed in the operating system..|
If you connect to the router wirelessly, if you can't remember the encryption key or password used for it's wireless security settings and the settings for your wireless adapter don't match and you can't connect to the router and therefore can't connect to the internet....
....then you need to access the router's configuration settings so that you can find and copy down the encryption key or password and the type of encrytption, and supply that info in Windows for the connection of the wireless adapter to the router.
You must either...
- connect your computer from a wired network port on it to a non WAN network port on the router via using a network cable
- or - if there are other computers connected to the same router on a local network at your location, access the router's configuration either via a network cable connection or via a wireless network connection that is already set up properly to the same router.
The default URL, 192.168.xxx.xxx you use in an internet browser to access the router's configuration Logon screen, and the default User Name, and default Password you need to type to access the router's configuration settings, are shown in the manual for your specific router model - if you have a CD that came with the router, the full manual is probably on that.
If you obtained the router from your ISP (Internet Service Provider) the default URL, User Name, and Password may be different - see the ISP's web site for support info about the router model.
(E.g.that applies to combo ADSL high speed modem / routers supplied by Telus in Canada.If you have the Optik TV / internet package, the Actiontec wireless N combo modem/router has the default URL, User Name, and Password on a stuck on label on the bottom side of the unit.)
If you get the manual from the router manufacturer's web site, make sure it's the manual for your specific Version or Revision of specific router model and that's it's for the region you bought the router in, otherwise the default URL, User Name, and Password may be different.