Issue with flash player and adobe connect.

I've had a few individuals trying to watch their training videos through an adobe connect link and get the message that they need 11.2 flash or higher to use it.  They had a new version installed but we still are getting the message about flash player so went through and downloaded version 17.  Still we had the same issue, I've looked everywhere online and can't find a resolution for this.  We uninstalled flash, restarted the computer and then reinstalled flash to no avail.  They do not have real player on their, computers as I saw that could be an issue but we've never had it installed.  All are windows 7 x64 computers.  We tried Firefox, Internet Explorer, and Google Chrome with the same results.  Made sure the add on was enabled in the browsers and deleted cookies/history and reset the browsers.  Even going as far us uninstalling Firefox and Chrome and trying a fresh installation of those.  This is happening on several computers, not all of them but on several.  All are the same model (over 50 computers in the group and this is happening with at least 5 computers) Dell Optiplex 7010.

Thank you