Atreyuu Hi.
You can turn Webroot back on, I personally use this security & they have never
interfered with L/W. When you upgrade L/W, go to webroot firewall permissions
and change L/W to always ask, Start L/W and it will reapply for permissions,
Give full permissions, Don't forget to untick the box, always ask for this prog.

6. Modem & router brand name & model numbers ?

Also I would ring Charter & ask if they are shaping your connection, or if they have any added firewall.
Peace.

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mickjapa108