To help us to help you and to properly get answers to your post you should include some minimum information.
1. Device type. ie PC, Laptop, Tablet, Surface, Phone
2. Who made it and model. If home built what type motherboard
3. OS type, Home, Pro, Enterprise, etc
4. Current build. Go Settings, System. About. OS build XXXXXX.XXXX
.
Have you tried downloading the Media Creation Tool an upgrading to the latest public release? 16299.125
When you download open it in File Explorer and double click on Setup.
You can also make a copy on a USB stick to have as a backup if you need to redo.