I have tried every suggestion in this thread, and every suggestion I can find on every other thread concerning reader 3.0 and 3.1 not starting and can say for certain that nothing is working in my case--even after several uninstalls, reinstalls and registry cleanings.
Start the program, nothing appears on the desktop, but a reader process can be spotted in task manager>services. Windows Vista. Reader 3.0 used to work fine, stopped working one day on its own, and nothing I can do will bring 3.0 or 3.1 back.
IThis software is useless to me.