Hi Ryo. I'm Greg, an installation specialist and 8 year Windows MVP, here to help you.
What I'd do at this point is install Media Creation Tool from this link, choosing the button to Install Tool Now and then open the installed app and choose Upgrade This PC Now: http://windows.microsoft.com/en-us/windows-10/m...
This is the most stable way to change to the latest version (which you need anyway) and because it reinstalls WIndows while keeping your files and programs in place, fixes most problems. It also brings all Windows Updates to date.
If there are any hurdles during install then these steps can overcome them: http://answers.microsoft.com/en-us/windows/wiki...
If these do not help then report back any verbatim error message or behavior.
If you want to temporarily block the update then try running the Hide Updates tool downloaded and installed from here: http://download.microsoft.com/download/f/2/2/f2...
If it wont' find and hide the Update then you can set a Metered Connection to turn off Windows Updates for awhile until the version matures and you can try again using the method I suggest which always works best: https://www.howtogeek.com/224471/how-to-prevent...
You can also go over this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done: http://answers.microsoft.com/en-us/windows/wiki...
Start with Step 4 to turn off Startup freeloaders which can conflict and cause issues, then Step 7 to check for infection the most thorough way, then step 10 to check for damaged System Files. Then continue with the other steps to go over your install most thoroughly.
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.