enable virtualization in the bios of your lenovo t450s
If you install VirtualBox, like I did last week, [at least] under Windows 10, and you have not gone into the BIOS ahead of time to enable virtualization, you will be limited to 32-bit guest OSes. Enable virtualization, and the 64-bit options become available. Not sure why you have to enable the hardware virtualization extensions to get…
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