Did you log onto the router with a pc linked via cat5 cable to the router? Never use a wireless link to do this.
Is the router IP address in fact 192.168.1.1? Did you change the user name and password from the factory default and since then lost the password and user name?
Can you successfully ping the default gateway IP address using command prompt?
Although Netgear (as well as Belkin, D Link, and Linksys) are low end home grade routers, you should see over 2 years of life from them unless they were subject to electric surge (as from an electric storm).
If all else fails, before you toss the unit, go to the maker's web site, download the manual for the unit, and check how to reset it. Usually there ia a reset button that will erase the configuration and return it to factory default status. Once this is done, reconfigure the router including wireless. It will give you the default user name and password.
Once you have it working, check and see if the maker has newer firmware available on his site and if so, upgrade firmware as the router maker directs you from his site. After firmware upgrade, configure the wireless configuration.