First, I'll give you a little outline of my internet problem and the internet itself.

I have Cogeco Cable highspeed internet which is supposed to be running at around 700-800 kilobytes per second. There are two computers that are connected to the internet. Thanks to a D-Link wireless router, the windows xp in the basement is connected with an ethernet cable and my iMac G5 2 floors up is connected wirelessly. The problem is, the windows xp which is the family computer runs at about 500 kilobytes per second, and my iMac G5 runs at 10-200 kilobytes per second depending on what it feels like. Normally it will take 10 seconds to load a page. If I'm lucky it will take 3 seconds but sometimes will will drag for 3 minutes or more. I know I'm capable of 500+ kilobytes per second speeds because when using the firefox extension download them all I get 300-700 kilobytes per second and when in the first 2 days after reformating my computer the pages would load instantly. In case it helps, I'm running firefox and OS X 10.4.7. Normally my internet usage consists of forums, IMs, looking at nintendo wii stuff, looking at buffalo sabre stuff, and watching flash movies. I don't play any online games.

Thanks

P.S. The same thing used to happen on the windows when I used to use it before I got my own computer (the iMac G5). That was fixed many system restores and ultimately a reformat.