VT-x is not available. (VERR_VMX_NO_VMX)

[elster]

I am a bit stuck. I have used VurtualBox on this computer before, but now I cannot even start to install any client operating system. I have tried versions
4.2.2 thru 4.3.24 and get the same error:
----
Failed to open a session for the virtual machine "guest_machine_name".
VT-x is not available. (VERR_VMX_NO_VMX)
Result code: E_FAIL (Ox80004005)
Component: Console
Interface: IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}
-------
VT-x is not available. (VERR_VMX_NO_VMX) .
So now I cannot even get to
where you boot up a OS image disk to start an install.
Tried;
windows xp SP1
windows vista basic
windows vista home premium
windows vista business
windows vista Ultimate
linux Kali
I don't think all these install disks are corrupted, so there...
--------------------------
Dell Studio XPS m-1640
Windows 7 Pro 64bit
coreinfo,.exe -v
Intel(R) Cor(TM)2 Duo CPU P7350 @2.00GHz
Intel64 Family 6 Model 23 Stepping 10, GenuineIntel
Hypervisor - not present
VMX - not supported
EPT - not supported
there is no virtualization settings in Bios
I have the newest Bios already flashed onto my system.
I have used VMBox on this computer and OS before; I need a clue!
----
VirtualBox Manager-- Machine>Settings>System>[Acceleration tab] is grayed out.
I tried to create a new guest machine and didn't even reach where a OS disk would
be read; The error occured and there was no disk in the optical drive. Therfore
this error occures regardless of what OS one would like to install.

[loukingjr]

Your CPU does not support VT-x. So you can only install 32bit guests. Except, Windows >7 (32bit) require VT-x, some modern Linux 32bit versions may require it as well such as Kali (not sure).
I think you might have to disable VT-x/AMD-V in the System>Acceleration tab in the VirtualBox Manager settings for the guests but it shouldn't be enabled, or should be grayed out. Not sure.

http://ark.intel.com/products/36750/Int ... 66-MHz-FSB

[elster]

the System>Acceleration tab is grayed out. So that is no way to make an adjustment.

[loukingjr]

Nope. Because the CPU doesn't support VT-x. That's why I thought it might be greyed-out.

[Geeklat]

I'm running into this same issue. I have 64-bit Windows 7 and have been running Virtualbox with 64-bit VM's for a while now. As of this week I now get this error and I only see 32-bit VM's as an option. Did a windows update do something, because that's the only other thing that's happened on my computer.

Update: I found a way around the problem after a few hours. I had to boot into the bios -> disable virtualization -> finish booting up fully. Reboot back into bios > re-enable virtualization -> finish booting up again. The only thing that I can think of is a windows update boinked a setting somewhere and this reset those settings.

[loukingjr]

I'm running into this same issue. I have 64-bit Windows 7 and have been running Virtualbox with 64-bit VM's for a while now. As of this week I now get this error and I only see 32-bit VM's as an option. Did a windows update do something, because that's the only other thing that's happened on my computer.

Update: I found a way around the problem after a few hours. I had to boot into the bios -> disable virtualization -> finish booting up fully. Reboot back into bios > re-enable virtualization -> finish booting up again. The only thing that I can think of is a windows update boinked a setting somewhere and this reset those settings.

Microsoft has been releasing faulty updates recently so maybe. Your problem is different however because the original poster's CPU has no VT-x support to turn on or off.

[elster]

After chasing my own tail for quite a while I stumbled upon what may be a solution; At least I have
been able to open up one guest OS. So here goes:

SOLUTION so far...
A file edit appears to solve this problem.
C:\Users\[User_Name]\VirtualBox VMs\[Guest_OS]\[Guest_OS.vbox]
Original script; <HardwareVirtEx enabled="true" exclusive="false"/>
Edited script; <HardwareVirtEx enabled="false" exclusive="false"/>
This seems to have worked, I was able to open up a guest OS
of Windows Vista Ultimate.