Step 1: Restart your laptop/desktop. Then, on the boot screen, press the BIOS key to enter into BIOS mode. (The BIOS key may vary depending on computer models. But you can follow the on-screen instructions or search it online)
Step 2: In the BIOS interface, use arrow keys to skip to Configuration tab. In most cases, the virtualization item is under Configuration, System Configuration, Advanced Configuration, or something like those.
Step 3: After finding the virtualization item (IVT, AMD-V, or something related to virtualization), press Enter key to make sure it is enabled.
Step 4: Press F10 to save the changes and then exit from BIOS.
After enabling Virtualization in BIOS, you should then restart your computer to run the virtual machine in VirtualBox again. This time, you will open this VM smoothly.
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