You can disable Hyper-V without deinstalling it. Start a command prompt with administrator rights and execute the following command:
bcdedit /set hypervisorlaunchtype off
Reboot windows. Hyper-V is disabled now. If you want to enable it, then run this command:
bcdedit /set hypervisorlaunchtype auto
and reboot again.
This solution still needs a reboot, but you don’t mess up your registry and don’t lose configuration settings.