My PC's internet connection does not work, wireless laptop and PS3 work perfect?

I have a netgear wireless router. My laptop and PS3 are working perfect with the connection. My PC is direct connected to the wireless router. My PC however is working at a slower rate than dial up. It takes forever for sites to come up. Once a particular site loads, if you surf w/in that site it will go a little faster, if you try to go to a different website it takes forever. I have checked my firewalls and that doesnt seem to be the problem. Time Warner has also come over and says that it is a computer issue. I have also done a system restore and started over from scratch, still this problem remains. I really need this PC to not be so slow. My laptop is an Apple and I do not like doing my work from it.