Hi. I currently use an install of Office 2013 on my personal/work Dell Precision LT. A company I'm contracting with asked me to explore Office 365 (comes with Word 2016 apparently), because some Word templates I am developing for them may be migrated to 365 in the near future. So I downloaded and installed MS's 30-trial version and played around with it for a day.



But now I am wondering if it will mess up my Office 2013 suite to have Office 365. The reason I asked is, after I'd closed Word 2016, I tried to launch good old Word 2013 from my Start menu. Unexpectedly, the orange-windowed '365' dialog popped up with the message, "Configuring Word 2013..." That had me worried that 365 was making some kind of config changes to 2013 that I do not want, since 365 is only a temporary guest on my machine. So I killed that process. After seeing and dismissing some odd Office error/warning, Word 2016 launched successfully looking like its old self. Phew.

So... how "safe" is it to have 365 on my machine? I don't want to be left with a 2013 Office suite I can no longer use (or is changed in any way, for that matter) once 365 goes bye-bye.