[
    {
        "role": "user",
        "content": "hmmm%2C%20for%20some%20reason%20Dropbox%20has%20stopped%20working%20after%20I%20updated%20to%20windows%2011."
    },
    {
        "role": "assistant",
        "content": "Sorry to hear Dropbox isn\u2019t working since the Windows 11 update. There are a few known issues between Windows updates and Dropbox, along with several effective fixes. I\u2019ll walk you through what\u2019s going on + what you can try to get it working again.\n\n---\n\n## \ud83d\udd0d What seems to be happening\n\nThese aren\u2019t rare:\n\n- Microsoft released updates (e.g. **KB5074109**, **KB5073723**) on or after January 13, 2026 that broke behavior of cloud-storage apps like Dropbox. Users saw problems opening or saving files to cloud-backed storage, crashes, and other unexpected behavior. ([reddit.com](https://www.reddit.com/r/dropbox/comments/1qj9kke/windows_update_possibly_breaking_dropbox/?utm_source=openai))  \n- There\u2019s a side issue where the Dropbox folder stops responding in File Explorer\u2019s side bar after installing update **KB5094126**. Uninstalling that particular update (or applying its preview fix **KB5095093**) has resolved it for some users. ([community.dropbox.com](https://community.dropbox.com/en/discussion/861070/dropbox-folder-on-the-windows-navigation-pane-does-nothing-when-clicked-on?utm_source=openai))  \n\nSo yes\u2014Windows patches are plausibly what's causing Dropbox to break.\n\n---\n\n## \ud83d\udee0 What to try\n\nHere are troubleshooting steps in approximate order you should try:\n\n1. **Check Windows updates**\n   - Go to *Settings \u2192 Windows Update \u2192 View update history*.\n   - If you see patches like KB5074109, KB5073723, KB5094126, etc., that match ones known to cause issues, make a note.\n\n2. **Install the latest fixes**\n   - Microsoft usually issues follow-ups to fix patch-introduced bugs. There\u2019s evidence that update **KB5095093** fixed the Dropbox folder sidebar issue. ([community.dropbox.com](https://community.dropbox.com/en/discussion/861070/dropbox-folder-on-the-windows-navigation-pane-does-nothing-when-clicked-on?utm_source=openai))  \n   - Make sure you fully install all cumulative/security updates after the problem appeared.\n\n3. **Opt out of the \u201cDropbox for Windows\u201d update**\n   - Dropbox changed its sync engine to use Microsoft\u2019s **Cloud Files API**. For some, opting out of this update (temporarily) has resolved issues like freezes, missing Explorer integration, etc. ([help.dropbox.com](https://help.dropbox.com/installs/dropbox-for-windows?utm_source=openai))  \n   - To do this: log out of Dropbox \u2192 log back in \u2192 go through the onboarding screens \u2192 at the final screen, pick **Advanced Settings** \u2192 check \u201cOpt out of Dropbox for Windows updates.\u201d ([help.dropbox.com](https://help.dropbox.com/installs/dropbox-for-windows?utm_source=openai))  \n\n4. **Advanced reinstall of Dropbox**\n   - Sometimes reinstalling cleanly, including removing leftover settings or broken files, helps. Dropbox has a documented \u201cadvanced reinstall\u201d process. ([help.dropbox.com](https://help.dropbox.com/installs/advanced-reinstall?utm_source=openai))  \n   - After uninstalling, reboot, then install the latest version. Use the offline installer if available. ([dropboxforum.com](https://www.dropboxforum.com/discussions/101001016/dropbox-desktop-app-wont-install-on-windows-11-and-gives-me-an-error/827077/replies/827597?utm_source=openai))  \n\n5. **New Windows user profile test**\n   - If Dropbox won\u2019t show up in File Explorer or fails to start properly, try creating a new user account on your PC just to test.\n   - Some users found the app works again under a fresh profile, implying corruption or permissions issues in the old profile. ([community.dropbox.com](https://community.dropbox.com/en/discussion/578463/dropbox-wont-appear-after-install-windows-11?utm_source=openai))  \n\n6. **Check firewall, antivirus, permissions**\n   - Stop or disable security software temporarily and see if Dropbox behaves differently. Sometimes a firewall or AV update blocks Dropbox. ([help.dropbox.com](https://help.dropbox.com/installs/unexpected-quit?fallback=true&utm_source=openai))  \n   - Also make sure Dropbox is installed locally, not on a network drive. That causes crashes. ([help.dropbox.com](https://help.dropbox.com/installs/unexpected-quit?fallback=true&utm_source=openai))  \n\n---\n\nIf you want, I can walk you through the *exact fixes* for your version of Windows (if you tell me the build you upgraded to) to narrow down what to try first. Do you want me to look up what\u2019s been fixed specifically for your version?"
    }
]