OK it might still be a false positive detection as the other detection is using heuristics and a step further paranoid heuristics, which would be even more prone to false detection.
Since the avast detection was also a generic detection you should send it to avast for analysis and correction as required.
If it is indeed a false positive and I believe it is, see http://forum.avast.com/index.php?topic=34950.msg293451#msg293451, how to report it to avast! and what to do to exclude them until the problem is corrected.
OK now for the O17 entries:
Well this is the range of IP addresses for clearwave.com 64.83.240.0 - 64.83.255.255 so none of the O17 entries exactly match that range.
However this one is likely to be legit as it is at least in the USA. It is a similar case to my own, where my ISP gets customers but uses a major Internet Provider for its services, that may be the case for you with clearwave getting its service from ATT.
O17 - HKLM\System\CCS\Services\Tcpip..{B42876B7-90B1-42FD-B0C1-9B890D930532}: NameServer = 12.127.16.83,12.127.17.83
So I would say these ones are suspect:
The IP Location: Ukraine Ukraine Ukrtelegroup Ltd (as it relates to the IPs in these entries below) ?
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 85.255.113.123 85.255.112.178
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 85.255.113.123 85.255.112.178
So I want you to ensure that in the Config section of HJT that the Make backups before fixing items, see image. Now put a check mark to the left of the two entries above and now click the Fix selected button. Run HJT again and ensure the two entries have gone.
Disconnect from the internet and try to connect again, hopefully you should be able to connect and that should be the end of it.
If you can’t and I think this would be a big if, then you would have to restore those fixes as I outlined in a previous post.
Before you do any of this I would suggest you print out everything in this topic so that you have the information to hand if you should need it.
That is me for the night as it is a little after 1:45 a.m. here, good luck.