Learn how to fix VirtualBox Installation failed error, Fatal error during installation by following the suggestions laid down in this post.

If you encounter VERR_ALREADY_EXISTS error in VirtualBox when creating a VM, installation or uninstalling extension, or anywhere else, just refer the solutions ...

Huzzah. How to install the extension pack for VirtualBox 7.0 To fix this issue, you must first download the extension pack. There is only one file for this and it works for all platforms.