Running Win XP SP3. Reader used to work on this computer but has now stopped. It may have been at the time of an update but ??? I removed the program using Add/Remove Programs and reinstalled the newest version. But all I get when opening Reader or opening a PDF is an error message: "Error 0xc0000022 - Application failed to initialize". I installed and am running as Administrator. Security settings on properties of all files I have looked at are set at the Administrator default level. I am not having any problems with other applications or programs opening. Suggested solutions?