Microsoft is getting ready to send reminders to Windows 8.1 users that support will end on January 10th 2023. Which is the same strategy that they used with Windows 7. What does that mean for you? Microsoft has a webpage here that has a FAQ which spells out what the end of support will means.
My advice is that if you’re still on Windows 8.1, or Windows 7 for that matter, you should be looking towards upgrading to a Windows 11 (or Windows 10) PC as that will provide you with a safer and more secure platform to do whatever it is that you need your computer to do. Because holding on to any computer that runs an earlier Microsoft OS really isn’t a good idea.