No, I didnt clone them, I installed them manually on each computers.
If you installed them manually on three different physical machines and generated the Internet ID in the Host settings it is next to impossible that there are duplicate IDs on even two Hosts, much less three or more :)
Are you sure you have indeed the same IDs on those Hosts? Could you please verify it by right-clicking the Host icon in the system tray and selecting "Internet ID connection settings". The ID will be displayed in a window like this:
1. Check that you have the most recent version of both Viewer and Host. This should be 184.108.40.206 as of this writing. There used to be issues with previous versions and Windows update, as described in this article.
2. If there is antivirus software on the Host computer, make sure you add the Host installation path to its exception list. This is recommended even if you don't have issues with this a/v software so far - you never know when they decide to block or restrict the software next time. A/V programs don't like remote controls much and often mark such programs as riskware.
Specifically about Symantec - there were couple of issues with them recently and each time we reported to Symantec. The last time they responded that the issue was fixed. But if you still have issues with Host settings erased or reset - and this is a sure sign of either a/v activity or Windows update activity - then let us know.
I will now convert this thread to a support ticket and we'll continue there. We may have a remote session and check if your Viewer is at all able to connect to any Hosts (e.g. our hosts here) and try to find the root cause.
Could you send your Internet-ID (NOT the password, just the ID) to me via forum private message or at email@example.com. I will check if your Host is accessible to verify that it's the issue on your Viewer side.