There is a link in the routers upgrade firmware utility that should take you to http://networking.belkin.com
. There is a link there that you can click to find out if there are any available firmware updates for the router. You should also be able to access that web address from any computer by simply typing the address (and clicking go) in the address section of the browser.
To get to the Upgrade firmware screen go to the Belkin Router screen (192.168.2.1) click on Utilities on the left and choose Upgrade Firmware. Check the current firmware version and compare it to the version available on the web site listed above.