E_ACT_NOT_READY & not able to delete my authorisation

When I try to open a .acsm file I get a communication error with code E_ACT_NOT_READY. I found on the internet that I then have to delete my authorisation. When I try to do that I get an error that Adobe can't delete my authorisation. I have tried to delete Adobe Digital Editions and reinstall the program but then again I run into the same problem. Can anyone help me?