New
#11
Unplug your storage HDD from sata on motherboard.
Unplug existing HDD with windows on it
Plug in new SSD into sata port #1 on motherboard
Install clean windows on SSD using usb
Download Windows 10 ISO File
Have your kids download /install steam etc on new SSD
connect storage HDD to sata #2 on motherboard
Then ask kids what is missing, if anything from steam etc
You are safe, you still have original HDD with windows on it you can always disconnect SSD and put back system as it was before and connect all drives as before you did clean install SSD
You can use SSD many installs , another clean install only takes about 10 mins to desktop and windows will download/install all necesary motherboard drivers to SSD automatic
I doubt your HDD has master slave etc as it sounds new and is sata cabled to MB
give it a try its safe no cloning needed and not difficult to do, as you can always revert back 100% to old system HDD configuration this way
Later you can reconnect old configuration HDD's and copy vids pics etc to a usb if desired
good luck