Microsoft doesn’t support installing two versions of Office on one computer and it was never a good idea even when it was supported in years past. Virtual machines are also the best way to run multiple versions of Office on the one computer. The virtual machine can run the same or older version of Windows (Windows 8.1, 7 or earlier) that’s fully compatible with the Office release you want.

That’s possible in Windows 10 or 11 using Hyper/V (except in Windows Home), VMware Workstation or other virtual machine products. The more reliable way to run older Office releases on modern Windows is using a virtual machine. How to reliably run older Office on Windows 11 or Windows 10 That doesn’t mean those versions of Office won’t work, just that Microsoft doesn’t recommend it and won’t help if you try. ‘Not Supported’ does NOT mean Office won’t work NOT supported on Windows 11 is Office 2013 or earlier versions of Office like Office 2010 and Office 2007.

Office 365 / Microsoft 365 for Windows (naturally).

With that little snippet of news, here’s the list of Office releases that ARE supported on Windows 11.

Excel 2013 to 2016 compatibility