Oracle/Sun Microsystems recently released an update version of the excellent virtual machine software called Virtualbox. But for some weird reason, I have been unable to either upgrade from the previous version or do a fresh installation in Windows XP, Vista Ultimate, Vista Home Premium 64-bit and Vista Business 64-bit . The installation always timed out midway through the file verification section and I got a “setup ended prematurely” error message. So far, the only way I was able to install the new version was to remove the old one first. So if you run into the same problem, uninstall the previous version before trying to install the new one.