Hi pedahl
Please follow below steps and let us knwo if having any more problem.
install the kernel sources next into my guest based on these instructions:
Open YaST / Software / Software Management - Select the View Button on the top left and pick Patterns. Now, you will see several Patterns listed and you want to select:
Development [X] Base Development [X] Linux Kernel Development [X] C/C++ Development
Then Press the Accept button on the bottom right and allow these applications to install.
3) Next I had to install the latest version of the tools VBOXADDITION 4.1.6 into my guest downloaded from the Oracle site.
4) Next I added the VirtualBox mount commands to the after.local file. See the following blog on how to do this:
After these four steps, openSUSE works great in a VM and it will also work for you.
Yours, Abbie 