Let me tell you my problem.
Every day when I try to get on the internet it won't connect, with either firefox/chrome/IE.
I reboot the router and then I can access the internet but if my comp sits idle while connected or I leave the internet and return a while later I can't connect unless I reboot the router again.
Another odd thing is sometimes when I use IRC (Internet Relay Chat), via a downloaded program, it works fine while at the same time I can't connect via the browser.
It might be a coincidence but the problems seemed to happen around the time I installed Norton360 on my comp. Any ideas?
Highly likey the 2nd problem is Norton.
As for the router, good ones last 10 years. Bad ones like the Singtel 2wire mio one (HGV2701) have lots of issues (heat trapped causing capacitor to spoil, dropping conections, power adapter). If this is yours, Singtel will replace it for you.
Router problems always affect thousands of people. Whenever I search online for issues with my router model I can find an answer.
If you have another computer/laptop, plug it to the router to test if it is a router issue, when you lose connectivity on the main computer.
That will help to isolate the cause.