1) To download Media Creation Tool, Click on the below link.
Media Creation Tool Link To Download
2) After finishing the download of this program. Open it.
3) Read and Accept the license terms
4) Check the box to upgrade this PC now and then click on Next.
5) It will start downloading the Windows File.
6) After finishing the download, Click Next. In the next screen, it will ask “What you want to keep” and there will be two checked box already as per your Old operating system.
After click on Install, It will start installing windows 10 on your computer and It will restart few times during upgrade.