Upgrade Windows 7 to Windows 10

1) Download the Windows 10 Enterprise Evaluation ISO file for your operating system from the TechNet Evaluation Center.
2) Create installation media by burning the ISO file to a DVD disc, or by extracting the contents to a USB flash drive. Insert the media and you will see the below screen.

Upgrade Windows 7 to Windows 10

On the first screen you could choose to Download and install updates.  choose not right now and click Next.

On the Ready to install page, click on Install.

Choose what to keep – Select Keep personal files only. If you want no old data to be seen after upgrade then select Nothing. Click Next.

Click on Accept.

The windows 10 installation would take few minutes to complete.

Restarting….    

Click on Next.

Click on Use Express Settings.

After restart the Windows 10 looks