I am writing here for a friend who has a Windows 7 system and Adobe Reader in version 9.4
Each time he opens Adobe Reader the system settings for color depth are changed to 256 colors, which makes PDF documents barely readable. It is possible to change the color depth back to normal in the system settings, but each restart of Adobe Reader switches the system again to 256 colors.
Does anyone here have a clue how to stop this behaviour of Adobe Reader?
My friend has tried to remove Adobe Reader and reinstall it, but the problem remains.
Since I am a Mac user my Windows abilities are very limited and I am very grateful for any help.