Windows 7 RC: Unsteady Internet connection?

[walk:the:line]

First of all: Sorry for my English, I'm from Austria and I hope you'll understand what I want to say.

Unfortunately I've got a problem with my computer, more precisely with my Internet connection. I'm surfing through the Internet and sometimes I get an loading error. It doesn't matter which browser I take! When I get the error for example in Google Chrome and then I try Firefox, Firefox also shows the error.

But the strange thing is that the network connection is okay. The Win7-network-center (I actually don't know how it's called in English) tells me that I've got Internet connection. But no browser's working at this time! Much more strange is this: Messengers like ICQ and also Outlook work perfectly!

Important so say is, that this problem happens only to my computer with cable-connection to the router. My laptop and my father's laptop don't have this problem. (both WLAN)

After approximately 5 minutes everything is over and Internet works perfectly again for about some hours. Then the same happens again.

A guy in a German computer-forum told me that this problem might have to do with the DNA-solution. (I really have no idea if this is the right word for it... the German word is: DNA-Auflösung)

I'd be really glad if you could help me, pleeeease!

 

[aviation_man]

Did he by any chance mean DNS?
Your computer might be timing out. I had that problem where I'd have to restart my router in order to get connection for a few hours then it'd time out again.
What you might want to try is: Get to command prompt (Start, in the little search bar at the bottom type "cmd". Type in "ipconfig/all". There it will display everything from your IPV4 IP address to your DNS server. Keep command prompt open.
Next, go to Network and Sharing Center. There you will see something that says " Connections: Local Area Connection" Click on Local Area Connection. A box will appear, inside this box, highlight (click on) "Internet Protocol Version 4 (TCP/IPv4) - Click on properties once that is highlighted. There you should select " Use the following IP adress"

Under this you will see a bunch of spaces.
Ip address --- xxx.xxx.xxx.xxx
Subnet mask xxx.xxx.xxx.x
Default Gateway xxx.xxx.xxx.x

Then at the bottom select " Use the following DNS server addresses"
Preferred DNS server: xxx.xxx.xxx.x
(Note, You don't have to put in an alternate, just the preferred)

Now from the command prompt where all the Addresses are, fill in the blacks (i.e IPv4 address.......xxx.xxx.xxx.xxx That address will go into the "Ip address" blank"
And so on and so on)

That should help. Let me know if you got confused or anything.