OK editing a bit, now that I slept:
Yesterday morning my computer was sluggish, I went to check internet and found myself connected to Utopia.net NOT Comcast! I did some google searching and was really scared by what I found!
After calling Comcast tech support, and asking them to read their own forums about utopia over and over, they had me replace my infected modem. Once this was done I found the DNS/IP settings did not change in my computer(still connecting to Utopia.net). I spent literally hours on the phone with Comcast and then their rep at Norton. Unfortunately they were no help at all.
By the end I was exhausted and my computer was only sometimes connected to the internet.
Tech support really doesn't know anything about this.
In frustration I started reading forums and trying all the cleaners and such, but the real trouble is my computer was not "infected" it just was stuck on this hijacked DNS.
What finally worked for me was: (After getting the new un-infected modem)
In Avast > protection > settings > select Utopia.net and click remove
Go to Control Panel\Network and Internet\Network Connections
Disable ether that is connected to utopia.net by clicking on the utopia.net in blue (i think it is left click)
Go back into Avast and be sure Utopia is still gone. (If not gone, remove it again See #1)
Go back to Control Panel\Network and Internet\Network Connections and re-enable the ether that you disabled.
This morning when I got up, I was pleased to see I was still connected to comcast.
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