Internet disconnects for a second

Hello, I just got a new computer and I'm having internet problems. I used to use an old XP desktop with direct connection and it stayed connected, used my vista laptop with direct connection and it stayed connected, and now with my new W7 desktop the internet does not stay connected. It just disconnects and reconnects in a split second. This interferes while I'm playing games (3 different games), it'll tell me I have lost connection, and when I check my internet connection it says I'm connected. Sometimes I see the little internet connection icon on the bottom say X then a little loading circle then back online in a second. It interferes when I'm streaming also. It happens every 10-30 min or so and it gets REALLY annoying. Anybody have similar problems? Any way to fix?

Welcome to Windows Seven Forums.

Useful information here: Constant disconnects from my wireless - Microsoft Answers

I suspect there may be incompatibility issues between your games and Windows 7. Can you run the games in Compatibility Mode for Windows XP SP3?

I did that and that problem still exists, and all the games do support W7. Also that wouldn't solve for streaming problems either.

Updated

Yes, my drivers are installed and updated, but I don't know if they were from a site or not. I bought my computer in parts online and they built it, so they installed, updated, and tested everything for me.

Its connected to a wired connection. The same connection i've been using in my previous OSes.

On the bright side, I did what you instructed changing the power management and 2 hours in, so far so good. Streamed an episode of House and didn't get interrupted for the first time since I got this computer. Hopefully I'll get lucky and it wont disconnect again while gaming. I will update my status if it starts happening again.

Sad to say, problem still exists. It was working fine for a couple hours, then started coming back, but not as often. Before every 10-30 min, now its about every hour or so, more or less.