We use Adobe's InDesign CS4 to prepare the books I write for publishing. The process is a bit counterintuitive, but produces good results. Imagine my feelings when I discover that having used InDesign on my PC yesterday that the prouct no longer works on the same PC. It would not load. After much experimentation I uninstalled and reloaded the software. The joys of finding the original DVD's last used a couple of years ago. Then finding the earlier software for the serial number because CS4 was an upgrade.
I rebooted the PC - InDesign would not restart! To cut a long story (5 hours) I tracked down an obscure reference on the Internet. My PC also has Rapport software provided by my bank to protect my web browser connection when using on-line banking.
Removing Rapport cured the problem.