A: Since version 1.6.0, you no longer need to uninstall VB in Windows, but can install it on top of the current installation.
This can be done by running the installer and follow the on screen instructions.
Although, it is not too difficult, we will show you how to update Virtual Box Guest Additions on Windows 10 guest.
This method should work on Windows 7 and 8 as well.
One of the minor annoyances of Virtual Box when compared to VMware is that update method for Guest Additions (known as VMware tools).
Virtual Box requires a manual update guest additions.
The one exception to this is due to naming clashes: you do need to properly remove an OSE package if you are replacing an OSE version with a PUEL versions (for example because you need USB support).All VMs are kept during the upgrade or when you uninstall VB.Note: After upgrading Virtual Box it is recommended to upgrade the guest additions as well.Virtual Box is an open source cross-platform virtualization software for x86 architecture, Which was developed by Oracle.Virtual Box is an amazing software which have lot of features compare with other virtualization software such as VMware,etc.., and still development team hardly working on virtualbox to improve the stability.