The link below seems to have what you want. You will need to delete older points and decide how much space to devote. I prefer to do a virus and malware check and a defrag before making a restore point. Windows ,as you know, makes one prior to installing updates. I prefer an ATI image of my OS and a mirror copy of my data.
How to get Windows 10 now: how to download and install Windows 10 even if GWX.exe is missing