2017.04.19
VirtualBox is a general-purpose full virtualizer for x86/x64 hardware.
Targeted at server, desktop and embedded use, it is now the only
professional-quality virtualization solution that is also Open Source
Software.
VirtualBox v5.1.20 Changelog:
* GUI: don't check if the Extension Pack is up-to-date if the user is about
to install a new Extension Pack (bug #16317)
* GUI: fixed a possible crash when switching a multi-monitor VM into
full-screen or seamless mode
* GUI: fixed non-literal shortcuts if the keyboard is not captured (5.1.10
regression; Windows hosts only)
* GUI: several mini-toolbar fixes in full-screen / seamless mode (X11 hosts
only)
* GUI: don't crash on restoring defaults in the appliance import dialog
* Windows Additions: another fix for automatic logins for Windows Vista and
newer (bug #15904)
* ICH9: fix for Windows guests with a huge amount (>64G) of guest memory
* BIOS: fixed El Torito hard disk emulation geometry calculation (thanks
Dwight Engen)
http://www.virtualbox.org/