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On start of the virtual machine you may see the error message shown in the screenshot.

Documentation > VirtualBox error on machine start > box_vt_error.png

The reason for that is that the Squirro virtual image is a 64-bit virtual machine. For this to work, your machine needs to have VT-x/AMD-V hardware acceleration enabled. This can usually be configured in the CPU settings in the BIOS of your computer.