First you need to download the Windows Update Tool. Click here: https://go.microsoft.com/fwlink/?LinkID=799445
This should download a file in your downloads called "Windows10Upgrade9252.exe"
Go ahead and double click that file to start it running.
It will do a quick compatibility check and you may have to hit next but you'll get to a point where it is downloading:

When it is done downloading (or if it was interrupted at any point) it may verify the download:

Then it will start installing:

Once it is done installing, it will want to restart. Go ahead and restart. It will take a good bit of time to apply this update on the way back up before you get back to a login screen. During this time the screen may go black and it may even restart again. Just be patient and wait until you get to a login screen.
Log in and you are done.
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