What is being slow in your pc, the entire OS, specific software, just the browser?, What is the pc running when is being slow, several programs?, are you downloading stuff at the moment of the slowness?, Wht is your actual internet speed? (Run one of the speed test out of the internet), how much ram do you have, what cpu. I do have to tell you that I got tired of xfinity because their connection was so slow that it would drop about twice every day, and I had to reboot the modem to fix the issue and that would only solve the problem 80% of the time.
Comcast ' suckyservice.
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