What is the life expectancy of a wireless router???

I have a Netgear 54Mbps wireless router, WGR614. It always says its a 'unsecure connection' when im online. I have constant problems with the computer acting up and getting viruses, despite all the antivirus/spyware tools, doing all the maintenes, and i do everything right to keep it safe. Can it be... show more I have a Netgear 54Mbps wireless router, WGR614. It always says its a 'unsecure connection' when im online. I have constant problems with the computer acting up and getting viruses, despite all the antivirus/spyware tools, doing all the maintenes, and i do everything right to keep it safe. Can it be because the router went bad???

*** How long should a wireless router last? We've got 3 different computers using it, and we've been using it for about 4 years now.
Update: Either way, is it a good idea, to go ahead and buy a new one every 2-3 years or so? Just to make sure you'll have the best performance possible?
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