I have a laptop with Pop!_OS installed and I don't want to partition or touch that hard drive at all since it is my main work machine. I installed a second hard drive and put Windows 10 on it, so the machine is now dual-booting on two separate hard drives.
Next, I'd love to virtualize the Windows 10 installation inside Pop!_OS. I created a vmdk that points to the SSD I installed Windows 10 on and created a machine but I get a "No bootable medium found!". I also used
VBoxManage storageattach "Windows 10" --storagectl "SATA" --port 0 --device 0 --type hdd --medium ~/VirtualBox\ VMs/win10.vmdk to attach the drive, but it still gives me the same error.
I'm not sure if it means anything or not but gparted shows two partitions that seem suspect labeled "boot/efi" and "msftdata" on my main Linux partition: