Recently I install adobe 9.3 on my home pc. Why can't I get rid of the previous application? Whenever I try to uninstall the previous application I get this message, "This patch package could not be opened. Verify that the Package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer patch package".
Reader 8.1.7 should have been uninstalled before installed 9.3 You will break 9.3 when you uninstall 8.1.7. You can uninstall 8.1.7 using the Microsoft Installer Cleanup tool. Then you will need to re-install Reader 9.3.