why do i get "This webpage is not available." for only some sites?

i am running windows XP w/ SP3 and in google chrome i get the message "webpage not available" the same pages are not available using IE 8 as well. funny thing is most sites work, but not windows update, and other misc. spybot update and windows defender, i have the latest updates on my ESET internet security and no threats were found on a "in depth" scan.

so why can i not connect to some sites, while others work?
I access the internet, by way of a hard wired connection to "2701HG-B Gateway"

2010-05-30T19:10:46Z

it happens in IE 8 as well therefor i assume Chrome is not the issue...

GaryM2010-05-30T20:17:17Z

Favorite Answer

if you see "oops web page not available" that means advertisers of certain site cached the page.
just click the "cached" and the page will be shown

Person2010-05-31T01:59:54Z

It seems to be a chrome problem, it used to happen to me when i used google chrome.