I'm trying to completely reinstall Windows 10 Home on a Lenovo Ideapad 110. I downloaded the ISO file and installed it on a DVD. I can't get it to run. I can't change the boot order because there is no option for installing from a DVD. I can't find anything online to tell me what keys to push to get to the troubleshooting part so I can at least clean it up by going back to original. However, this machine originally was a Windows 7 machine so I'm not sure what it would take me back to which is why I'm trying to completely install Windows 10. Any ideas are welcome.