Error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED) [duplicate]

Question

I have installed Oracle VM VirtualBox 5.0.12, and now trying to start it up.

But shortly after trying to power it up, I get an error message saying:

VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)

Have other readers experienced the same issue and resolved it successfully? Please let me know. I have checked out other threads on Stackoverflow which report the same error message, and tried out the suggestions mentioned there, but none of them is working for me.

If it would help, I am running Windows 7 Enterprise edition SP1 64 bit.

Does anyone have an idea what the problem could be?

Answer 1

You may have virtualization disabled on the host computer. To enable:

• Go to your host computer's BIOS (during reboot, press F12, or Delete, or F2, ... depends on computer).
• Find some options regarding virtualization. E.g. recent Lenovo's have it under Security / Virtualization.
• Enable what's there to enable. E.g. VT-d technology [Enable].

This made it work for me.

Answer 2

Try going to Settings -> System -> Motherboard on VirtualBox and change the RAM size.

Increase the RAM size and try to start it up again. It worked for me, hope it works for you as well!