I had to fight with enabling/disabling Hyper-V in windows features for a while, and also somewhere I flashed the BIOS on my motherboard and it reset my virtualization-enable switch to "off" (which I guess was the default?)

50/50 PEBKAC and Windows being difficult, IMO, but my total unfamiliarity with troubleshooting windows made the process a bit more annoying than I felt it ought to be.