My internet keeps stopping!

[Topper59]

First off:

Intel Pentium D 925 3.0 Ghz

Abit IL9 Pro Motherboard

3 GB DDR2 RAM (2 GB OCZ Platinum, 1 GB Generic)

XFX GeForce 8600 GT 256MB

Phillips DVD RAM drive

Seagate IDE HDD 110GB (Windows 7)

Seagate IDE HDD 160GB (Mac OS X 10.5.6)

Hitachi SATA HDD 80GB (Windows XP)

Acer 19" WS Monitor 1680x1050

 

Ok, so I installed iATKOS v5i 10.5.5 on my computer, works fine. I even got quarz extreme and everything else working. I decided to press my luck and update to 10.5.6 using Apples official update, I rebooted twice and now I'm running 10.5.6! (yeah, I'm very lucky)

 

But, my internet works for the first 10 web pages or so, and then quits. My routers fine because the internets working on other computers. If I restart, I get about 10 more web pages, and then it dies again. Im using a D-Link DWA-542 on my computer, and a D-Link DIR-615 router.

 

At install I used the Realtek R1000 (which i have used before and worked flawlessly)

 

EDIT: also, in Software Update, everything is up to date

 

Any help?