First, close all the applications on your computer and restart
Some applications (like firewall, security, or antivirus software) can cause the Dropbox desktop app to quit or crash. To fix the problem, first try closing all the applications on your computer, and then restart. If that doesn’t work, the following sections list some additional things you can try.
Make sure the Dropbox desktop app is up to date
Your device settings determine if you have to manually update your apps or if the apps update automatically. As required by your device, update the app to the latest version. If you determine that an app is no longer needed, uninstall it.
If you’re enrolled in a beta or early access version of the Dropbox desktop app, upgrade to the latest stable build of the Dropbox desktop app.
Uninstall and Reinstall the Dropbox desktop app
If you need to perform a manual update, uninstall and reinstall the Dropbox desktop app to ensure you’re using the latest version.
Check permissions in your firewall, security, or antivirus software
If you’re using firewall, security, or antivirus software, grant the Dropbox desktop app full permissions.
Make sure Dropbox supports your computer and operating system
To make the most of your Dropbox experience and features, ensure that Dropbox supports your device and operating system. Keep your operating system updated to the latest version. Learn more about Dropbox system requirements.
If you’re adding or syncing a large number files, add or sync them in batches
Use selective sync to sync fewer files to your computer or sync them in smaller batches. Learn more about file syncing limitations.
Make sure Dropbox isn’t installed on a network drive
Some customers experience crashes when the Dropbox desktop app for Windows is installed on a network drive, making it unusable. To resolve this issue, uninstall Dropbox app from the network drive, then reinstall it on a local drive (for example, C: drive).
Contact Support
If none of these solutions work, contact Dropbox Support.
