Once you can swallow the evil that W10 is.....spyware, and FORCEWARE, it exists to be a portal for you to use their goods, services, it is NOT for the user; you are forced to serve them, since they are YOUR master.......
1. I can help you with stopping updates, they will undo your choices and most of the time they are NOT necessary.
2. You can do easy tricks to get back the choices they took from you.
3. ALL games I played so far in W10 were designed to play on W7 and even XP! Only a handful did not work, but there were tricks to fix that.
4. Any games that don't work ....you can create a VIRTUAL environment and they will run. I am not just saying that, I have done it.
5. I still run Windows 3.1! (I am restoring old games for my collection). Some people collect butterflies or stamps, I collect and restore software.
6. I always recommend ordering hardware and building the PC from scratch. Thats just me I guess.
7. Like it was stated above, STEAM allows you to install on different drives, but you wont get to specify what folders, just the DRIVE.
8. I even uninstalled the built in crap that goes with w10, like the candy game and all apps they forced, you will find alot of them CAN'T be
uninstalled like the normal software.
Bottom line, it's manageable. I recommend Win 7 for those that don't wan't to fuss over things,want to OWN their PC, have control, however I am guessing you want to get your money's worth and use what O.S. came with your P.C.