Cross-platform virtualization without installation.
Download Portable VirtualBox MultiVersion Setup Extractor (0.5 MB)
Download VirtualBox-4.3.16-95972-Win.exe (105 MB)
and Oracle_VM_VirtualBox_Extension_Pack-4.3.16-95972.vbox-extpack (15 MB)
in the same location of Setup Extractor.
In first screen enter: 4.3.16-95972
Extension Pack available
Extract and run VirtualBoxPortable.
Settings of installed VirtualBox should be preserved.
If you can't run previously created machines, go back to 4.3.12-93733:
Download VirtualBox-4.3.12-93733-Win.exe (105 MB)
and Oracle_VM_VirtualBox_Extension_Pack-4.3.12-93733.vbox-extpack (15 MB)
in the same location of Setup Extractor.
In first screen enter: 4.3.12-93733