Mac user here. I am unable to close Adobe Reader. I have tried opening other files and it says Unable to open as a task is active in Adobe- but I can not figure out what other task is active? I have tried closing Adobe but get the same message - can not close because task is active. It says try ending task then closing. I tried Command Q. When I try a Hard shut down - same thing - Can not Shut Down - prevented by Adobe because task was active. Is there anyway to close or quit this Application or be able to use it again? Preference to get rid of it.