Without security updates or fixes, you're putting your computer at risk - especially dangerous, as many forms of malware target Windows devices. No one can force you to upgrade from Windows 7 to Windows 10, but it's a really good idea to do so - the main reason being security. Read more: Windows 7 support is dead, but these seven security tips will still protect your laptop Do I have to make the switch to Windows 10? That's why it's important for you to switch to an OS version that Microsoft will still put resources behind.
Your Windows 7 computer will keep working, but Microsoft won't provide security updates or fixes, or technical support for any issues - leaving your computer at greater risk from viruses and malware that may circulate to take advantage of any flaws that are later discovered.