I'm having a problem with NAC 4.6.1 and agent 126.96.36.199. If a client already has an older CAA installed they get prompted to upgrade and it works fine. However, if no agent is installed and you try to install it from the http page, it acts like it is installing then installs the web agent. I can manually install the 188.8.131.52 agent on the client. Yes, the user is an administrator. I uploaded the 4.5.2 agent and the clean install works fine.