I'm getting a startup error for the desktop app on my Windows computer.

dmhaas011

As the title suggests, upon opening Dropbox, I am prompted with this error: 

 

 

This occurs when Dropbox attempts to register the Windows Cloud Files filter during startup. I've uninstalled Dropbox, checked my firewall, everything. Nothing seems to have fixed it.

Upon opening the error message:

bn.BUILD_KEY: Dropbox

bn.VERSION: 241.4.4795

bn.constants.WINDOWS_SHELL_EXT_VERSION: 89

bn.is_frozen: True

machine_id: [Redacted]

pid: [Redacted]

cwd: 'C:\\Windows\\System32'

     real_path='C:\\Windows\\System32'

               mode=0o40777           uid=0   gid=0

     parent           mode=0o40777           uid=0   gid=0

HOME: None

appdata: 'C:\\Users\\USERNAME\\AppData\\Local\\Dropbox\\instance4'

         real_path='C:\\Users\\USERNAME\\AppData\\Local\\Dropbox\\instance4'

                              mode=0o40777           uid=0   gid=0

         parent       mode=0o40777           uid=0   gid=0

dropbox_path: None

                              not found

              parent  not found

sys_executable: 'C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'

                real_path='C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'

                              mode=0o100777        uid=0   gid=0

                parent               mode=0o40777           uid=0   gid=0

trace.__file__: 'C:\\Program Files (x86)\\Dropbox\\Client\\241.4.4795\\python-packages.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'

                real_path='C:\\Program Files (x86)\\Dropbox\\Client\\241.4.4795\\python-packages.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'

                              not found

                parent               not found

TMP: C:\Users\USERNAME\AppData\Local\Temp

TEMP: C:\Users\USERNAME\AppData\Local\Temp

tempdir: 'C:\\Users\\USERNAME\\AppData\\Local\\Temp'

         real_path='C:\\Users\\USERNAME\\AppData\\Local\\Temp'

                              mode=0o40777           uid=0   gid=0

         parent       mode=0o40777           uid=0   gid=0

Traceback (most recent call last):

  File "desktop/dropbox/client/main.py", line 6945, in _setup_root_for_account

  File "desktop/dropbox/sync_root/helpers.py", line 199, in create_root_for_account

  File "desktop/dropbox/foundation/futures/basic.py", line 1040, in result

  File "desktop/dropbox/sync_root/manager.py", line 382, in create_root

  File "desktop/dropbox/sync_root/handlers/windows/cloud_files.py", line 299, in register

  File "desktop/dropbox/sync_root/handlers/windows/cloud_files.py", line 601, in _register

OSError: [WinError -2145452017] Do not attach the filter to the volume at this time

dmhaas011

Update. Another user has helped me find a solution: The Dropbox desktop app won't start or sync on Windows 11 | The Dropbox Community

"This entire issue had to do with a Dropbox update to make it compatible with Microsoft's new sync API called Cloud Files. The solution was to unlink my desktop from the Dropbox dashboard, uninstall, reboot, reinstall. Then during the welcome process at the end choose advanced setting Check the Opt Out checkbox under Dropbox for Windows Updates.

That's it, it all works now."

I concur, this helped fix the issue!