We have a Windows Server 2008 R2 server that publishes a few remote apps that my users access. One of our sites has been complaining of issues where their PC will stop responding for minutes at a time. They can move the mouse around but clicks don't resond. They claim that if they close the remote app it frees up their PC. It only occurs at this other site, and not at our main office. The server is located offsite at a datacenter, so it is accessed remotely by both sites over an always on VPN. Because of these factors I think it could potentially be due to their internet service there, but I don't understand why a remote app would hang up all the local processes on their machine, even if the network were to go down.
Has anyone ever experienced this before, or have a recommendation on how to fix it? I'm completely lost on this issue and really don't know where to start.