OptiPlex 755 - Error: This CPU is VT-capable, but VT is not enabled (Check your BIOS/firmware settings)

[giovino]

Machine Configuration:

Model: Dell OptiPlex 755

BIOS: A03

Processor: Intel Core 2 Duo CPU E6850 @ 3.00 GHz

OS: Windows Vista Enterprise 64-bit SP1 Beta

VMware: 6.0.2

BIOS Settings:

Virtualization: This field specifies whether a Virtual Machine Monitor (VMM) can utilize the additional hardware capabilities provided by Intel(R) Virtualization Technology. (Status = On).

VT for Direct I/O: This field specifies whether a Virtual Machine Monitor (VMM) can utilize the additional hardware capabilities provided by Intel(R) Virtualization Technology for Direct I/O. (Status = On)

Scenario:

Trying to create a guest OS of Windows XP 64-bit SP2.

VMware Error messages:

Summary: This CPU is VT-capable, but VT is not enabled (Check your BIOS/firmware settings)

Full: You have configured this virtual machine to use a 64-bit guest operating system. However, this host's CPU is not capable of running 64-bit virtual machines or this virtual machine has 64-bit support disabled. For more detailed information, see

Output of "Porocessor Check for 64-Bit Compatibility":

Results: This host is capable of running 64-bit guest Operating system under this VMware product.-----

Given all this information, does someone know why I cannot run a 64-bit guest OS in VMware?

[admin]

Have you power-cycled the host since enabling VT in the BIOS?

[giovino]

Yes... I have turned the machine off and on several times.

[admin]

In that case, you probably have a buggy BIOS. Download this ISO and boot the host from it to find out if VT is really enabled on each core.

[giovino]

vt.iso reported that VT was NOT enabled on the CPU.

I did the following:

• 1. BIOS setup > loaded BIOS defaults > restarted - (VT now disabled)

• 2. BIOS setup > enabled VT > restarted

• 3. Booted into vt.iso > it reports that VT is enabled

• 4. Verified that I am now able to run a 64-bit guest.

Thank you for the prompt response and solution.

[miszuni]

This solution helped me - thank you.