Awhile ago, I said goodbye to windows 7 (rather than upgrade to Microsoft's latest and 'greatest'), and added a new harddrive to my computer. Today, a few upgrades later, and I'm running the Pop_OS! flavor of Linux (an Ubuntu derivative). However, occasionally I find myself needing a windows program that I don't have an equivalent for on Linux (and wine won't run it). Rather than restarting my computer each time I want to get into it, I've heard there's a way to get a VM program like QEMU with VMM GUI to run my disk as a VM.
However, of the guides I've seen are for taking an empty drive and turning it into a repository for multiple VMs, or using it whole for a fresh VM, not turning an existing OS installation into a VM unto itself. How do I do this?