If you encounter VirtualBox Error VERR_ALREADY_EXISTS, you should reboot the host computer before installing a fresh extension or a VM. Your system is most likely ...

We can use two or more operating systems at the same time through a Virtual machine without using a physical machine. But some users encounter an VERR_SUP_VP_THREAD ...

Have you tried VirtualBox 4.1 yet? I hope it isn't because the latest packaged version for your OS is 4.0.12 and you feel as if you're stuck there. You're not stuck ...