Yep, 30 day trial and buy. Alternately go on line, buy an older version. I am running Office 2010, runs OK, but Windows 10 doesn’t like Office 2000.
I do not know when Office 2018 may come out but here is Office Professional Plus 2016
Get the cd as the download cannot be saved. You would need to download again if you reinstall Windows so you would need to save the purchase information. It is cheaper now if you get it on a USB drive. Just USB $19.95
https://www.microsofthup.com/hupus/home.aspx
It will ask you for your company email address to verify.