If you need a free desktop office suite, these Open Source options are safe and compatible with Word/Excel files: : The most popular free 64-bit alternative. WPS Office : Very similar look to Microsoft Office.
If you specifically need a desktop installation from that timeframe, you must have a valid product key. Office 2016: Released in late 2015. It is the successor to Office 2013. Office 2013: Internally known as Version 15.0 Microsoft Office 2015 Free Download 64 Bit
To avoid viruses and ensure software stability, always use official Microsoft channels. Even if you are looking for an older version like Office 2016, you can still access it through your Microsoft account if you have a valid license. If you need a free desktop office suite,