Well, sometimes I have trouble specifically with Toonzone. I have a highspeed connection, but there are still times it takes forever to load.
If you're talking about the internet as a whole, I would check to see if you've got spyware on your computer. That would suck big time, because it sends peronsal info about you to mysterious people and it slows down your system performance. In my experience, they can't be eleminated with Window's simple uninstall utility. You have to get a special program to remove them. And in worst case scenarios, you may be looking at a full-scale re-formating to clean your system up, meaning you'd lose all your data, would have to reinstall windows, and basically start from scratch.
Not an appealing prospect, but that's what I had to do to rid my system of spyware a couple of years ago.