Have you tried rebooting the comcast cable modem and the linksys wireless-b broadband router? I would try the reboot of the comcast first
I am running a windows me system with a linksys wireless-b broadband router and a comcast cable modem i am getting an unusual slow time of around 50.7kb or lower per second when I should be getting around 1MB or so it's been like this for a couple of days and wondering if I should call my ISP the pages load slow and the downloads

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