I can't open any virtual machine on VirtualBox

Question

I'm using Ubuntu 17.0.4.

The error code is :

Failed to open a session for the virtual machine windws 7.

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

Result Code: NS_ERROR_FAILURE (0x80004005)

Component: ConsoleWrap

Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

Solution

Please try these ways:

1. Go to your BIOS settings (By pressing F12, F2, F8, or Delete, ... depends on machine).

   And make sure Virtualization option (It can be have names like VT-d or AMD-V or Intel Virtualization Technology or Virtualization or ...) to be enabled. (And if its be disable make it enable)

2. Go to VirtualBox settings >> System >> Motherboard

   And then increase RAM size (For example to 2GB is good).

3. Go to VirtualBox settings >> System >> Acceleration

   And then Uncheck the Enable VT-x/AMD-V option.

Comments

[Ali Razmdideh]

Please go to VirtualBox settings and increase RAM size. Also go to your BIOS settings and check Virtualization option to be enabled.

[Hossam Elzhar]

where can i find bios setting ?

[Ali Razmdideh]

Which machine do you use ? laptop ? PC?

[Hossam Elzhar]

i'm using laptop

[Ali Razmdideh]

Which model do you use ? you can find how to go BIOS settings of your laptop by googling it but in many cases F12 or F2 may be helpful

[Boris Hamanov]

See askubuntu.com/questions/256792/…

[georg]

See also this question: stackoverflow.com/questions/33304393/… ... conclusion: set RAM of virtual machine below 3G

[Boris Hamanov]

Why would you disable Enable VT-x/AMD-V?

[Boris Hamanov]

The last line is still wrong.

[Boris Hamanov]

That answer is wrong. See askubuntu.com/questions/256792/…

[Jithin Pavithran]

How was this answer accepted?. One cannot edit Acceleration settings when it has a saved session. And the issue says that VBox is not able to start the saved session.

[Ali Razmdideh]

@JithinPavithran This is not about a saved session. And OP had accepted this answer because his session was powered off (as you see in the image). If you have different issue (about saved session), you can ask a new question.

[pihentagy]

point 3 solved for me