This is an article elaborating on Windows end of support dates and Microsoft future sales and pricing strategy: https://www.zdnet.com/article/when-will-microsoft-pull-the-plug-on-your-version-of-windows-or-office/
For Office 2007, support has ended... problems with Office under Windows 10 may demonstrate that you have to replace Office 2007 with something else. Microsoft is going to a periodic fee model. If you don't like that approach, then the free OpenOffice or LibreOffice Suites are an option. (Details: https://docs.microsoft.com/en-us/deployoffice/office-2007-end-support-roadmap).
Office 2010 Extended support ends in October 2020. You will need to replace that version in the next year of so.
If you want to buy an Office product and have it last for another 8 years or so, you might as well get 2016 now.
