Merge branch 'roland.krause-master-patch-35452' into 'master'

Added troubleshooting Windows10 installation.

See merge request !5

virtualbox.md

@@ -84,3 +84,8 @@ Then we can set up the port forwarding:
 * Password is still `lcsblcsb`. You can change it with `passwd`, if you want.
 
 Congratulations, you successfully configured the VirtualBox Ubuntu VM and connected to it via SSH! You can now follow the Linux instructions in the [main tutorial](../README.md).
+
+## Troubleshooting
+
+### Windows10 Hypervisor
+Some installations of Windows 10 disable virtualization by default which leads to a VirtualBox error when opening a session on the Ubuntu host system with the Details including `Not in a hypervisor partition`.  In this case try changing the BIOS settings [as explained here](https://techsupportwhale.com/not-in-a-hypervisor-partition/).