Admittedly, our diverse and “integrated: home network involves devices using (at least, by last count) six different OSes, though most are just different versions of Windows, Linux (and another ‘nix OS), and Android, but of the Windows boxes, only one was still using my fav, to date, Windows version, Win7Pro. Oh, well, no more. One hour into the upgrade, and the installation process notes 12% installed (though it lies; it’ll take quite some time to get it really installed, locked down, and configured). Amusing thing is that although I really only needed a valid license key, the least expensive license key from a genuine M$-authorized retailer was only available by purchasing a USB drive with the installation files. It was a little over $1 cheaper than purchasing a license key “with download.” Didn’t need the flash drive (have the latest installation files; I download them monthly just in case someone needs repairs that Win10 borks on–it’s happened more than once), but bought the flash drive/license key combo, ‘cos, well a lil over $1 cheaper and included a flash drive I could repurpose.
I only, finally, caved, because recent iterations of Win10 work pretty well with a music transcription software I consider an essential program (and no, it does NOT work well on a Linux box, no matter how much I have tweaked WINE–THE reason I kept that particular Windows box at Win7: poor Linux execution of Windows calls on that software and slightly hinky operation in earlier Win10 operation). Oh, and Me$$y$oft is making their noises about end of support for Win7. Still not real happy with some parts of Win10 (and utterly despise some others *cough* Cortana among those *cough*), but it’s good enough for some uses.
After that computer is set up right, time for monthly checks on the ‘nix boxes.
Just maintenance stuff.