"Dropbox is ending support for Windows 7, 8 and 8.1" message but I'm on a Windows 10 PC.

Hey Energirad, welcome to our Community! 

Odd behavior there indeed.

Is it possible that you recently upgraded your device's OS, by any chance?

In any case, I'd love to have a visual of the error message you mentioned, and specifically the one asking you to quit the app. If you could attach it here, that'd be amazing.

Keep me posted, and we'll take it from there! 

Here is a picture of the error message and the Windows version. Unable to attach attachments when I press paperclip.

How do I attach a screenshot?

You can use copy-paste or try to CTRL-C and then CTRL-V Energirad. 

I hope it's okay for me to jump in here, Energirad.

May I ask, is it possible that when you first installed Dropbox on this computer, it was on any of the soon-to-be unsupported Windows OS versions?

Also, have you tried uninstalling the Dropbox app, restarting your computer and then reinstalling it?

Kan jeg spørre, er det mulig at når du først installerte Dropbox på denne datamaskinen, var det noen av de snart ikke-støttede Windows OS-versjonene? YES

Har du også prøvd å avinstallere Dropbox-appen, starte datamaskinen på nytt og deretter installere den på nytt? NO

I will try uninstalling the Dropbox app, restarting my computer, and then reinstalling it. Will see if that helps.

Hey Energirad, just checking in with you to see if you've had the time to try out the uninstall process and how it turned out!

Yes I have tried. Unfortunately the same result with the same message to quit Dropbox