Running a VM on Windows 8 without disabling Hyper

I know, there is a bigger discussion about this topic, but currently I did'nt find a good solution for this issue.

First: I got a Windows 8.1 host system that uses Hyper V to run the Windows Phone 8 Emulator.

I also would like to run a virtual machine on this system (VirtualBox, VMWare, whatever works).

The solutions I know:

Hyper V Manager to set up a virtual machine (e.g. a UNIX-system)

Hyper V is made for server environments, so there are no USB and sound drivers.

The usage of bcdedit.exe to enable/disable Hyper V (+ reboot) to run other VMs than Hyper V VMs

I don't want to reboot my system to run a virtual machine. :/

Maybe someone else has a good idea for me. Some ideas I have in mind is to run the Windows Phone Emulator without Hyper V - but this is probably not possible. Or to run a virtual machine while Hyper V is enabled, I don't need hardware virtualization in that VM, but it should be fast enough to run e.g. a browser and to play videos and some other stuff.

Do you need some more information about my pc?

Thanks.

Since you are using Windows 8.1, it does support USB redirection to VMs and also getting audio from VMs! But it has to be a "Generation 2" VM. You need to enable and install Integration Services on the VM to do this.

Here is what you will need to do:

From Hyper-V manager, right click on your Hyper-V Host (left pane) > Settings > User > Enhanced Session Mode > Check option "Use Enhanced Session Mode"
In the same dialog, also check option "Allow enhanced session mode" under "Enhanced Session Mode Policy"
In Hyper-V manager, right click on the Vista VM and go to Settings > Management > Integration Services > Check option "Guest Services".
Connect to VM > Action > "Insert Integration Services Setup Disk"
Install Integration Services and Restart VM.
When you reconnect, you will get a Connection setting dialog and you should be able to configure both USB and Audio settings from there as shown in image below: