If you receive a message from Dropbox saying that you need to update your operating system, your computer may not meet our system requirements.
To fix this issue, check that Dropbox is running on a supported operating system. If your operating system isn’t supported, update to a supported version.
Supported operating systems are listed in our system requirements.
Compatibility mode on Windows computers
If you’re using a Windows computer, check that "compatibility mode” isn’t enabled for Dropbox. To use the Dropbox desktop app on a supported operating system, disable compatibility mode.