I have a client using PS CS4 on Windows 7 32-bit, files don't open, no error message, nothing happens. Rebooting doesn't help. All drivers seem to be in order.
Create new file-> nothing happens. Open file-> nothing happens. I can browse for the file and select it but nothing happens.
I connected to the clients computer using Team Viewer to troubleshoot, the problem disappeared. A couple days later it happened again so I connected once again and I witnessed the problem firsthand.