After installing the latest Client Access 7.1 PTF package it began acting oddly. The first session would always load/work fine. But any other session I launched would be as if nothing was clicked, or a simple black Client Access session screen would appear with "disconnected" on the bottom then nothing.
Using Task Manager in Windows, I was able to see that for each session I clicked on, another pcws program was running. I would have to kill each one of them or reboot the Windows session in order to resolve the issue--but then only with one session actually working.
So I did what any long-time Windows user would do, I uninstalled Client Access and re-installed it, then launched it once. Then closed it down and installed the current PTF package.
So far, all is well today.