How to fix the error message “Failed to acquire a VirtualBox COM object”

VirtualBox is open-source software for virtualizing the architecture of x86 computers. It acts as a hypervisor and creates a VM (virtual machine) on which the user can run another OS (operating system).

The operating system that VirtualBox runs on is called the “host” operating system. The operating system running in the VM is called the “guest” operating system. VirtualBox supports Windows, Linux, or macOS as the host operating system.

When setting up a virtual machine, the user can specify the number of processor cores, the amount of RAM and disk space allocated to the VM. When the VM is running, it can be “suspended”. At this point, the system execution will be frozen and the user can use it again later.


What is the cause of the “Failed to Acquire a VirtualBox COM Object” error?

What is the cause of the "Failed to Acquire a VirtualBox COM Object" error?

We looked into this issue by examining various user reports and repair strategies that are usually used successfully in this particular scenario. It turns out that several culprits can trigger this problem:

VirtualBox not being installed with administrator privileges: Virtualbox is one of the programs that must be installed with administrator privileges to set up all necessary services. If you don’t, some services may not be enabled by default. In this case, the easiest way to solve the problem is to install Virtualbox correctly.

Incorrect registration of the master guest: In some cases, this error is due to potentially incorrect registration of the master guest. If this scenario applies, you can solve the problem by creating a .VirtualBox to the desktop and have the application create a new healthy version.

Insufficient permissions: Even if VirtualBox is installed with administrative privileges, it may still need administrative privileges to run some services necessary to run the VM. Some affected users were able to solve the problem by configuring the VirtualBox shortcut to run with administrative privileges.

If you are just looking for a solution to this problem, you can find a few troubleshooting steps in this article that may solve the problem. Below you will find several methods that other users in a similar situation have successfully used to solve the problem. The effectiveness of each of the possible solutions listed below has been confirmed by at least one interested user.

For best results, we recommend applying the methods in the order in which they are presented, as they are ranked in order of effectiveness and severity. Regardless of the cause of the “Cannot acquire VirtualBox COM object” error, one of the following possible solutions should help solve the problem.


How to fix the “Failed to Acquire a VirtualBox COM Object” error?

How to fix the "Failed to Acquire a VirtualBox COM Object" error?

Using a file viewer

Note: Make sure to uninstall all previous versions of VirtualBox software first.

Step 1: Press the Windows + E keys to open File Explorer. Now click on that PC on the left and double-click on the C drive.

Step 2: Now go step by step to the next location:

Double-click on User.
Double click on your user name.

Step 3: Now look for two folders: .VirtualBox and .Virtualbox.sav. Select both folders, right-click and click “Delete” to delete the folders.

That’s all you need to do. Now restart your computer and install the VirtualBox program again. It will now open without any problems.


Frequently Asked Questions

  1. Uninstall VirtualBox.
  2. You may want to clean up your registry and/or file system at this point.
  3. Download (if you haven't already) the latest version of VirtualBox and its ExtPack.
  4. Remove (not just disable) any third-party antivirus software.

  1. Go to the control panel and uninstall VirtualBox.
  2. Reboot the computer.
  3. Download the latest version of VirtualBox.
  4. Right-click on the downloaded file and click "Run as administrator".
  5. Follow the on-screen instructions to install VirtualBox.
  6. After installation, restart your computer.

  1. This is most likely due to the fact that VT-x (hardware virtualization) is disabled on your computer.
  2. To activate VT-x, you need to enter your BIOS configuration.
  3. Select the Recovery tab.
  4. Find Advanced Boot and click Reboot Now.
  5. Select Troubleshooting.
  6. Select advanced options.
  7. Select the UEFI firmware settings.
  8. Click Reboot.

Go to "Start" (Shell), "Control Panel", "Programs and Features". You will see a list of installed applications in alphabetical order. Left-click on "Oracle VM VirtualBox" to select, then "right-click" and select "Uninstall" from the menu.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.