I just downloaded the latest Virtualbox 5.1.30 on my Windows 10. The download seems fine and the file successfully downloaded. But when I try to install it (by double clicking on it), I get the following error message.
“Installation Failed! Error: This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer Package.”
It happens many times with the same error. I can install any other Windows software without any problems. Seems there is something in the Virtualbox installer file.