DNS problems with 2-wire 3801

No it is DNS not DHCP and this is the only router.

Have you checked the stats on each of your computer's network connections? The reported dns server listed in those stats should be the address of the RG. If not, check your network connection config on each computer. They should be set to automatic for IP address and DNS servers.

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How can you be in two places at once, when your not anywhere at all?
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I really want to become a procrastinator, but I keep putting it off.
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There are three kinds of people, those that can count, and those that can't.
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“Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man, and our politicians take advantage of this prejudice by pretending to be even more stupid than nature has made them.

Bertrand Russell

Thanks Computer-Joe, yes all of the settings are correct I have been connecting to this RG on all systems except my main system (I built it last month 8/4/2011) since it was installed 2/12/2011. This problem just developed a few days ago.

I have performed major maintenance and performance enhancements as well as disabling services and startup progs that are not essential on all systems over the last two days, using Advanced SystemCare Pro, Smart Defrag, and a few other registry (cleaning and defrag) tools as well as manually doing what is needed and as of this AM things seem to be back to normal i.e., slow internet connectivity and downloads. So I cannot put my finger on what was causing the problems but for now this particular issue is resolved.

Thanks again for the suggestions.

Unfortunately, this now appears to be an intermittent problem as I lost connection for over 20 minutes today (9-25-2011), the windows network diagnostics again says "The DNS server isn't responding".

Or try OpenDNS

          208.67.222.222

          208.67.220.220

__________________________________________________________
How can you be in two places at once, when your not anywhere at all?
------------------------------------------------------------------------------------------------------
I really want to become a procrastinator, but I keep putting it off.
------------------------------------------------------------------------------------------------------
There are three kinds of people, those that can count, and those that can't.
------------------------------------------------------------------------------------
“Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man, and our politicians take advantage of this prejudice by pretending to be even more stupid than nature has made them.

Bertrand Russell

Very helpful Computer-Joe, I am currently rebuilding (my primary system, takes approx 4 days to rebuild completely) from format to re-installation of everything so I will try your suggestions, since it is an intermittent problem only time will tell, but I will keep you posted. I will however configure some of the other systems to test these, thanks again.

@aviewer, I changed the DNS server settings on my systems to use the Google servers ip addresses 8.8.8.8  and 8.8.4.4, it seems to have resolved the problems, thank you!