ERROR_INSTALL_PACKAGE_OPEN_FAILED 1619 This installation package could not be opened
ERROR_INSTALL_PACKAGE_OPEN_FAILED 1619 This installation package could not be opened. Verify that the package exists and is accessible, or contact the application vendor to verify that this is a valid Windows Installer package.
I am having some trouble installing programs like Adobe reader, QuickTime, and iTunes. I am running vista x64 SP1 and just updated my windows installer to version 4.5.
ERROR_INSTALL_PACKAGE_OPEN_FAILED 1619 This installation package could not be opened. Verify that the package exists and is accessible, or contact the application vendor to verify that this is a valid Windows Installer package.
What do I do now?