Have you ever tried to power on a new ESXi guest host and come across an error message saying "The host is VT-capable, but VT is disabled. VT might be disabled if it has been disabled in the BIOS settings or the host has not been power-cycled since changing this setting". An example screen shot of this error:
To correct this issue, reboot the server and pull up the bios settings (usually F2)
You will need to pull up the CPU information and adjust the 'Virtualization Technology' state from Disabled to Enabled
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