Solve : Something to do with *DNS*?

1.	Solve : Something to do with DNS?
Answer» Hi I've only add my computer 4 a WEEK now and for some reason when i TRY to OPEN a site i get a message SAYING Internet Explorer cannot display the webpage so i press the button to see why and it say's DNS detected with a yellow triangle but i can still go on other sites but some times the pages are unavailable so i hit the back button then repeat to the page again and some times it works. So how do i fix this. I'm using windows 7 os thanks carl

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