I'm sorry about the issue. When did you install Windows 10?
Please reply at the box below. Thank you.
Please click on Start (which is the windows logo icon at bottom left of computer's screen), then click on Settings. Then click on Update & Security, then click on Recovery, then there, select the option to go back to your previous Windows version, and continue.
When you are available, please type at the box below, then click on the Send button below to communicate with me, so I can help further. Thank you.