Corruption in system files can make Event Viewer record entries about "The CldFlt service failed to start due to the following error:". To dismiss such entries, you must perform SFC and DISM scans. In addition to that, it's a good idea to uninstall and reinstall OneDrive, make changes to the Windows Registry, ... Try out the solutions in our analysis and you will be able to get rid of entries that involve CldFlt service in Event Viewer.