I recently moved to a new house, got a new computer, and upgraded from Win7 to Win8. When I go on a webpage, the browser goes into the white loading screen for about 5-10 seconds, then everything loads almost instantly. It doesn't matter if I go on a media-heavy webpage or a simple webpage, they all take the same time. For videos, it takes 5-10 seconds to open the webpage, but I can watch 1080 videos without any lag.
My connection speed is 25Mb up, 1Mb down. Speedtest.net: http://www.speedtest.net/result/3273746569.png
This problem only occurs on my desktop, which is connected to the router using an ethernet cable. This problem occurs in both my browsers: Chrome and Firefox. My PHP scripts also take a long time to fetch pages, so it isn't my browser's issue. I tried pinging several websites. Half the websites take about 10-50ms, and the other half timed out.
I'm thinking there's an issue with my computer when it initially establishes a connection with a website. How do I find the issue?