How to Fix Oracle VM Virtual Box Error "Failed to open a session for the virtual machine ..."

Another solution
Settings > System > Acceleration / Select KVM
Done

I got that error when updating to the latest version (6.1.36), so upgrading to the latest version is non sense: however removing Virtual box completely, deleted the installation folder (d:\program files\oracle\VirtualBox) and then re installing to the same directory worked, the Virtual Servers were still there after re installing Virtual Box. and the error was gone.
Edit: the error is not gone: i decided to downgrade back to the previous version of Virtual Box.

Thanks is worked for me ,you are best

I spent more than 6 hours searching for a solution
And I moved from the BIOS to the features of the system and to a lot of complexity

Thanks to you, I solved the problem with one click. Thank you

excelente aportación

After day of not knowing what to do, I had to disable and enable virtual technology. What I needed was to update the virtual box 😊😄 thanks a lot man. You deserve a subscription.....

What a great solution... Thank you for the idea to reinstall. I feel relieved now

ere mi salvador love this

Didn't Work For ME

Thank you so much!!!!!! It works for me

windows 10 on windows `10 what a great Idea

thank you

ahhhhhhh the feeling of it not working :)

Didn't worked for me . (Virtual Box 2020.4 )

thank you very much bro

I have x86 (32bit) so 5.2 works, it gives me the error, i tried upgrading, 6.1 won't work with 32bit,i installed 5.2 again it still gives my the error

literally reinstalled before watching this video and it doesnt work.

nikk shit

Thanku so much
It works well

it didn't worked still cant open

I tryed but it didnt work :(

Is it work on mac??

BASURA

i love u thxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +1 subbbb

thanks man, 2020 working:D

I tryed to reinstall, but in 6.1 it doesn't worked for my Dell Windows 10 x64.

Don't work you are Fucking ldiot

tanks

so many bots here lol 90 likes 140 dislikes

Hi this problem shows me when installing virtualBox on kali Linux (EE) Segmentation fault How to fix it

It did not work for me any other ideas?

The reinstalation with update, in my case from 5.2 to 6.0 worked like a charm, thanks very much to share the information!!

Thanks a lot :) Re-installation worked

Upgrade solved the problem as you illustrated. Thank you

Congrats. You have taught us how to make a useless video.

my pc reinstalling does not working version 6.0.8

This is not working.

It dosnt work u idiot!!!!!!!!

The reinstalation worked! Thank you so much!

Thanks a lot man . I followed and run the solutions of almost all the videos with this error nothing worked finally yours nailed it !

this actually works for me. thanks a lot

Thanks man, work on here now !!

This doesn't work. The error is due to the fact that you allocated more than 3 GB of RAM.

If you want to allocate more than 3 GB of RAM you need to be on:
- 64 bit system
- Enable Intel virtualisation