If you see the error message “No hypervisor was found. Please enable hypervisor support in the BIOS and try again,” it means that your computer’s BIOS is not set up to work with the Windows 10 Sandbox feature. This error can be fixed by changing a few settings in your BIOS. First, enter your BIOS by rebootings your computer and pressing a key when prompted (often F2 or Del). Then, look for an option called “Virtualization” or “Hyper-V.” Make sure this option is enabled. If it’s not, enable it and save your changes. Finally, restart your computer and try again. If you’re still seeing the same error message, it’s possible that your computer doesn’t support virtualization. In this case, you won’t be able to use the Windows 10 Sandbox feature.