Cross-platform virtualization without installation.
Download Portable VirtualBox 64 bit Online (0.6 MB) 19/04/22
In first screen enter 7.0.14-161095 and 7.0.14 for Extension Pack
7.0 is only 64 bit and have different launcher and folders: backup previous version.
Download Portable VirtualBox 32-64 bit Online (0.5 MB) 09/03/17
Thanks to Dirk Gently for fixs
In first screen enter (twice if Extension Pack needed): 6.0.14-133895 or 5.1.30-118389
Extract and run VirtualBoxPortable.
Don't use if you have VirtualBox installed.
Online installer is also setup extractor if you download
VirtualBox-7.0.14-161095-Win.exe (103 MB)
and Oracle_VM_VirtualBox_Extension_Pack-7.0.14.vbox-extpack (11 MB)
in its folder.