What causes the error failed to open a session for the virtual machine? How to fix the error VirtualBox failed to open a session for the virtual machine? This post from MiniTool will show you the solutions.

Some users complain that they encounter the error failed to open a session for the virtual machine when trying to start the virtual machine from the VirtualBox on Windows 10. If you also has come across this error, here are some suggestions that can help you to fix the error that VirtualBox failed to open a session for the virtual machine.

So, in the following part, we will show you the solutions.

4 Ways to Fix Failed to Open a Session for the Virtual Machine

In this section, we will walk you through how to fix the VirtualBox error failed to open a session for the virtual machine.

Way 1. Open VirtualBox as Administrator

To fix the error failed to open a session for the virtual machine, you can choose to open the VirtaulBox as administrator.

Now, here is the tutorial.

  1. Right-click the desktop shortcut of VirtualBox and choose Properties.
  2. In the Properties window, go to the Compatibility tab.
  3. Then you will find the option Run this program as administrator and check it.

After that, re-launch the VirtualBox again and check whether the error failed to open a session for the virtual machine is solved.

If this solution is not effective, try another solution.

Way 2. Install Platform Package

In order to solve the error VirtualBox error failed to open a session for the virtual machine, you can choose to install platform package. The platform package can help VirtualBox to use various components with ease.

Now, here is the tutorial.

  1. If you already have the platform package on your computer, just install it.
  2. If you don’t have the platform package on your computer, you can click here to download it and install it.

After that, reboot your computer and check whether the error failed to open a session for the virtual machine is solved.

If this solution does not take effect, try another one.

Way 3. Discard Saved State

In order to fix the error VirtualBox failed to open a session for the virtual machine, you can choose to discard saved state.

Now, here is the tutorial.

  1. Right-click on the Virtual Machine.
  2. In the pop-up window, select the Discard Saved State.
  3. Then press Ctrl + J to end the process.

After that, reboot your computer and restart the VirtualBox and check whether the error failed to open a session for the virtual machine is solved.

Way 4. Reinstall VirtualBox

In order to fix the error failed to open a session for the virtual machine, you can choose to reinstall the VirtualBox.

Now, here is the tutorial.

  1. Type Control Panel in the search box of Windows and choose the best matched one.
  2. In the pop-up window, choose Uninstall a program under Programs to continue.
  3. Then select the VirtualBox and right-click it.
  4. Then choose Uninstall to continue.
  5. After that, go to the official website of VirtualBox and choose to download the latest one.
  6. Then install it on your computer.

After you have completed all steps, try to check whether the error failed to open a session for the virtual machine is solved.

Solved – VT-x Is Not Available (VERR_VMX_NO_VMX)
Solved – VT-x Is Not Available (VERR_VMX_NO_VMX)

When opening the virtual machines using VirtualBox, you may encounter the VT-x is not available error. This post shows how to fix this problem.

Read More

Final Words

To sum up, this post has introduced 4 ways to fix the error that failed to open a session for the virtual machine. If you come across the same issue, try these solutions. If you have any better solution to fix this VirtualBox error failed to open a session for the virtual machine, you can share it on the comment zone.

  • Linkedin
  • Reddit