I'm sorry about the issue. You can go back to Windows 7 within 30 days of installing Windows 10:
- Click on Start (which is the Windows logo icon located at the bottom left of the computer's screen), then click on Settings, then click on Update & security, then click on Recovery, then there, click on the option to go back to your previous Windows version there.
Please reply at the box below to continue troubleshooting. Thank you.