Hello I recently purchase a Dell Studio 1535 with Windows Vista Home Premium, I've tried to install Adobe Reader 9 and Safari 3.1.2 for Windows, and both came up with an error message saying 'This installation package could not be opened, verify that the package exists and that you can open it, or contact the application vendor to verify that this is a valid Windows Installer package'. I'm running the applications as administrator and have been able to install other exe. files. Does anyone have any ideas what the problem might be?