If u leave your computer on 24-7 like me and your on a cable broadband connection.............You should reset your modem every once in awhile.
If there is not a reset button on the back of your modem,then shut-off your computer and unplug the power to you modem for a few minutes then plug back in and reboot.
When you do this it recycles your modem.......causing your modem to remake it's connectins to your computer and service provider.
I do this every so often when my connection is sluggish and it helps.
Peace brotherdoobie B)