(SOLVED) VirtualBox Error 0x80004005: Failed to open session for VM

In this video, learn how to fix the VirtualBox Error 0x80004005, when you try to start a Windows 8.1 or a Windows 10 virtual machine:"
Duplicate config values '/CPUM/CMPXCHG16B' and '/CPUM/IsaExts/CMPXCHG16B' – please remove the former! (VERR_DUPLICATE)".

1. First, close VirtualBox Manager.

2. Start a Command Prompt as Administrator.

3. Type the following command and press Enter:

cd \Program Files\Oracle\VirtualBox

4. After that, excute the below command to list the VM Machines.

5. From the output of the above command, remember the name of the VBOX machine, where you get the error 0x80004005.

e.g At our example, the VM machine with the "0x80004005" error, is the "Windows8.1_x64_Pro".

6. Next, type the following command, but replace the "VM-Your-Name" value, with the name of the VBOX machine that you face the error 0x80004005, and press Enter:*

Now, try to launch the VM machine that has the problem.

[yijunpanstautland]

Thanks Youtube for removing the dislike bar now I wasted 10 min to try something it did not work.

Vote this comment up so others can skip this video!

[eriksteyn]

I did try the method that was shared with us. Unfortunately it is not working.

With Windows 10 Pro, You can run either Sandbox or Virtual Box. You can't run both due to the Hypervisor.

To fix the Virtual Box issues:

Enter this command:

CMD should be run as Administrator


bcdedit /set hypervisorlaunchtype off

Some report this command was needed also:

DISM /Online

I did try the work around again, it worked but stopped working.

I am also having issues again with the bcdedit. I will come back to you guys when I have resolution to the issue.

[CarlGermanNpc]

hi can you do launch error when i can't launch the progman itsefl not the windows OS

[SliimDaKiidBeats]

TO EVERYONE WHO GETS THIS VIDEO ENSURE YOUR VM IS NOT IN THE SAME BIT VERSION AS YOUR ORIGINAL OS.

To do this, go to your host machine's settings, and check if it is 64bit or 32bit
If it's 64 bit (if your computer is newer than like 2005 it will be), you can't use 64 bit VMS you can only use 32 bit VMS

If it's 32 bit idek how tf you plan on running vms on your shits

[genostelar]

cd \Program Files\Oracle\VirtualBox --> The system cannot find the path specified.

[finallyfinder]

0:28 if you see C:\WINDOWS\system32>cd /Program Files/Oracle/virtual box
The system cannot find the path specified. type in cd C:\Program Files\Oracle\VirtualBox

[bolo.youtube]

in the my virtual box the problem its not fixed (im using the translate to speak english)

[rezaaditia]

0:34 This app canot run in your PC.
Help