There was certainly a semi-forced situation at one point. My mom's Windows 7 laptop started the Windows 10 installation automatically one night, with no questio

There was certainly a semi-forced situation at one point. My mom's Windows 7 laptop started the Windows 10 installation automatically one night, with no questions asked. The computer just restarted and started installing it. Now the reason I say semi-forced is that it was still possible to cancel it. The automatic process got paused at the EULA acceptance screen and if you chose not to accept the license terms then the installer would start a lengthy rollback process and eventually get you back to Windows 7. On my own computer I never experienced this because I proactively chose hide update for any Windows 10 related patch.