To access these free web apps, just head to Office.com and sign in with a free Microsoft account. Click an application icon—like Word, Excel, or PowerPoint—to open the web version of that application. You can also drag and drop a file from your computer onto the Office.com page.Which versions of office work with Windows 10?
According to the Windows Compatibility Center, Office 2013, Office 2010, and Office 2007 are compatible with Windows 10. Older versions of Office are not compatible but might work if you use the compatibility mode.