The CldFlt Service failed to start issue notification usually crops up after updating Window 10/11.
Since it is related to your system, you must fix it very carefully.
This post onMiniTool Websitewill help you to fix this issue and provide you with proper guidance.

This service starts running automatically with Microsoft OneDrive.
If you are looking for fixes now, this guide may help you out.
How to Fix The CldFlt Service Failed to Start Error?

Before modifying the registry, you should back up it to avoid potential damages.
PressWin + Rto open theRundialog.
Navigate to the following path by pasting it into the navigation bar.
Locate the registryStartwhich is of typeREG_DWORD.
Right-hit it to open theEditwindow and changeValue datainto3.
PressOKand reboot your system.
Typecmdand pressCtrl + Shift + Enterto launchCommand Promptwith administrative rights.
After the process is done, runCommand Prompt with administrative rights and trigger the following command.
Dism /Online /Cleanup-Image /RestoreHealth
Step 5.
The DISM tool will scan and repair the corrupted files, yo wait patiently.
Find an entry namedEnabledand right-press it to chooseModify.
PressOKand reboot your PC.
you might reinstall OneDrive to see if it helps you out.
Go toSettings>Apps> Apps & features.
In the app list, scroll down to findMicrosoft OneDriveand hit thethree-doticon beside it.
PressUninstalland then hitUninstallagain to confirm this action.
Reboot your machine to see if the CldFlt Service failed to start error is gone.