I run a dual-boot Windows/Linux system on my laptop and have been doing so for almost a decade. This gives me the flexibility to run games and certain proprietary software on Windows when needed (such as VMware Workstation and Adobe Photoshop) and use Linux for development and server administration. I recently decided to switch from Gentoo to Debian - but this time only use the programs in Debian's main repository.
This ruled out installing VMWare or Virtualbox so I exported my main virtual machine from VMware and imported it into QEMU/KVM using the below set up. Finding documentation to do this was a bit harder than expected but once I read enough manpages the process was extremely straightforward.
Begin by exporting the virtual machine into the OVF format. OVF is a open packaging format for virtual machines. This will make sure that any snapshots you have or cloned machines (you may be surprised at the parent tree for a given VM) are exported into a portable format.
Once you have the exported machine, place it in an accessible location from the Linux installation. It's usually a good practice to place the VM on a separate physical volume from the host.
Install the necessary tools on the Linux installation and add yourself to the virtualisation groups.
# apt install qemu-kvm libvirt-clients libvirt-daemon-system virtinst # adduser
libvirt # adduser libvirt-qemu
Import the VM into the QEMU format so you can support snapshots and save space.
.ovf -i ovf -D qcow2 --destination ~/vm --noautoconsole
Now, you can use virt-manager to configure the virtual machine by importing the qcow2 image.
After this, it should be pretty straightforward using the GUI.