I use Verizon DSL, and the connection frequently breaks off. Most of the time when I'm on youtube or other online streaming site, the video will get stuck and stop loading. Even after I tried reloading it, it would get stuck again at some other spot. Many times when I was downloading files, it would stop downloading midway. Sometimes when I'm browsing websites, and I clicked on a link, it would just say "loading" while not load at all. The modem (Westell 6100) is directly connected to my computer, and there are five lights on the modem: power, ethernet, usb, dsl, and internet. Whenever there is web activity, the internet light usually blinks at the same time. Now whenever there is a connection problem, the light stays solid the whole time. However, at the moment that a video stops streaming, and I opened another window to go to a website, it did load successfully. So that means the connection only breaks off selectively. Also, the dsl light is solid the whole time, which means I'm connected to the internet. Also, this problem occurs to both Firefox and IE.
So far, I've tried clearing my cache, reinstalling my browsers, deleting Kapersky (I thought it was the culprit for blocking the connection.), resetting my modem and router, and the problem persists. I need help, serious help. I tried calling the CS many times, but they never give me any solution. I tried asking elsewhere (yahoo answer), but that was fruitless.

I hope the specialists here can provide me with an actual solution. Thank you in advance.