Installed reader X on winxp pro. Immediate problems displaying pdf's - get message that readerX has encountered a problem and must close. When attempting to repair/remove and re-download, get win intaller message - patch package could not be opened - and the process quits. New download attempt senses exisiting version and will not download and over-write. Same with downloading older versions. Now have an unusable installation and no apparent method to delete. Any suggestions?
You could try using the Windows Installer Cleanup Utility to remove all traces of any existing versions of Reader. This utility is no longer supported by Microsoft because it can conflict with Win 7, but you can still find it in sites like http://majorgeeks.com/download.php?det=4459
Claudio: As you suggested, this worked. Thanks. Ed