VirtualBox - Linux Mint not starting - VT-x is not available
Solution 1:
Start up in BIOS. Look for these settings:
Look at this article:
VT-x settings
Vt-x is not enabled in the BIOS settings. The machine’s CPU does not support vt-x. Hyper-V virtualization is enabled in Windows. Core location is enabled.
Solutions:
Disable Hyper-V Virtualization. Disable Core Isolation from Windows Defender. Enable VT-X from BIOS Settings.
See if these work, or alternatively if your system will not run 64-bit guests.