Download portable VirtualBox 4.3.14-95030 x86-amd64 Multilingual

Cross-platform virtualization without installation.
Download Portable VirtualBox MultiVersion Setup Extractor (0.5 MB)
Download VirtualBox-4.3.14-95030-Win.exe (104 MB) and _VM_VirtualBox_Extension_Pack-4.3.14-95030.vbox-extpack (10 MB) in the same loion of Setup Extractor.
In first screen enter: 4.3.14-95030
Extension Pack available
To go back to 4.3.12-93733: download VirtualBox-4.3.12-93733-Win.exe (104 MB) and _VM_VirtualBox_Extension_Pack-4.3.12-93733.vbox-extpack (10 MB) in the same loion of Setup Extractor.
In first screen enter: 4.3.12-93733

Extract and run VirtualBoxPortable.
Settings of installed VirtualBox should be preserved.