I kept getting the error when trying to install the trial of NOD32 "This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package." Now, I have viewed the ESET Knowledge Base, Reinstalled the Windows Installer and I still get it. Why is this? I'm trying NOD32 v3 to see if that works.. why are they .msi and not .exe? It's times like these where I wish it was .exe Thanks in advance.