How to Fix Cldflt.sys Blue Screen Error

Hi everyone,

I recently encountered a Blue Screen of Death (BSOD) with the error Cldflt.sys on my system. I’m not sure what’s causing it or how to fix it. Could someone guide me on the possible reasons for this error and the steps to resolve it?

Thanks in advance for your help!

This topic was modified 3 months, 1 week ago by Will.
This topic was modified 3 months, 1 week ago by Will.

Tagged: Windows 11

Windows

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Mira Lennox Lennox

Participant

October 8, 2025 at 5:40 am

Hey! The Cldflt.sys BSOD usually points to issues with the iCloud driver on Windows 11. It can happen if iCloud isn’t updated, conflicts with other software, or has corrupted files. First, make sure iCloud is fully updated to the latest version. If it already is, try uninstalling iCloud, rebooting, and then reinstalling it cleanly. Also, run a quick sfc /scannow in Command Prompt to check for corrupted system files. If the BSOD keeps happening even after that, check for recent Windows updates or driver conflicts, especially storage and network drivers, as they can interact with Cldflt.sys. That usually resolves it in 90% of cases.

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