Office 2010 will reach its end of support on October 13, 2020. If you haven't already begun to upgrade your Office 2010 environment, we recommend you start now.
Also, support for Windows 7 ends on January 14, 2020. Even though Office 2010 is still supported until October, Windows 7 will no longer receive security updates after January 2020, unless you purchase Extended Security Updates (ESU). Without ESU, Windows 7 is vulnerable to security threats. For more information, see the Windows 7 end of support site and Lifecyle FAQ-Extended Security Updates.
Office 365 ProPlus, the subscription version of Office that comes with most Office 365 enterprise plans.
Office 2019, which is sold as a one-time purchase and available for one computer per license.
A key difference between Office 365 ProPlus and Office 2019 is that Office 365 ProPlus is updated on a regular basis, as often as monthly, with new features. Office 2019 only has the same features that it had when it was released in October 2018.
source and more reading: Microsoft
Also, support for Windows 7 ends on January 14, 2020. Even though Office 2010 is still supported until October, Windows 7 will no longer receive security updates after January 2020, unless you purchase Extended Security Updates (ESU). Without ESU, Windows 7 is vulnerable to security threats. For more information, see the Windows 7 end of support site and Lifecyle FAQ-Extended Security Updates.
What does end of support mean?
Office 2010, like almost all Microsoft products, has a support lifecycle during which we provide bug fixes and security fixes. This lifecycle lasts for a certain number of years from the date of the product's initial release. For Office 2010, the support lifecycle is 10 years. The end of this lifecycle is known as the product's end of support. When Office 2010 reaches its end of support on October 13, 2020, Microsoft will no longer provide the following:- Technical support for issues
- Bug fixes for issues that are discovered
- Security fixes for vulnerabilities that are discovered
- Because of the changes listed above, we strongly recommend that you upgrade as soon as possible.
What are my options?
With Office 2010 reaching its end of support, this is a good time to explore your options and prepare an upgrade plan to either of these latest versions of Office:Office 365 ProPlus, the subscription version of Office that comes with most Office 365 enterprise plans.
Office 2019, which is sold as a one-time purchase and available for one computer per license.
A key difference between Office 365 ProPlus and Office 2019 is that Office 365 ProPlus is updated on a regular basis, as often as monthly, with new features. Office 2019 only has the same features that it had when it was released in October 2018.
source and more reading: Microsoft