DNS SERVER NOT RESPONDING, HELP!!!!!!!!

[JG1965]

I have just got a new lap-top and my dongle worked fine for a few days but everytime I sign on to the internet it works for a few minutes and then I receive the message DNS SERVER ISN'T RESPONDING.
Can someone tell me simply how to fix this, I have Windows 7 Home Premium installed, the dongle and internet worked great on my old lap-top but this problem is driving me mad.
I understand it might be a problem with Windows 7, so can someone tell me simply how this can be fixed.
Thanks in advance.

[galeck1947]

Go to start then control panel then open up Network and Sharing Center and check your internet connection . I am assuming you connect via wireless from your dongle to your server. If you run a diagnosis on your connection when you get this message Windows will try to repair this. Have you spoken to your ISP about this issue ?