This is more of a "I need to figure this out for my sanity" situation, rather than "I need to figure this out or the computer won't work"
I manage 20 computers at a public library. They are all brand new, purchased in 2017 and configured by our system's IT guys. They all had Office 2007 installed on them by the IT guys, and on one of them I noticed that there are blue arrows on the Office icons.
I recently uninstalled Office 2007 and installed Office 2016 on all the computers. Again, the arrows appeared on the icons--again, the only computer to do so.
I read this thread and checked the advanced attributes. The box "Compress contents to save disk space" is not checked. What else could be causing the arrows on the icons?