How to Repair Cldflt.Sys Blue Screen Issue on Windows PC

  • Blue Screen is a tormenting issue with system crash, hang, and freeze.
  • Faulty Windows updates, corrupted system files, presence of malware are other factors that can lead to this Blue Screen error.
  • Windows Defender Security Center can help you keep your computer safe against malware attacks.
  • You can resolve this issue by running a full scan of your computer using Windows Defender.
  • The Blue Screen Of Death (BSOD) can be fixed easily using the following steps –.
Updated December 2023This tool will stop these errors and fix common problems: Get it at this link
  1. Download and install the software.
  2. It will scan your computer to find problems.
  3. The tool will then correct the issues that were discovered.

Cldflt Sys Blue Screen

Blue Screen is a tormenting issue appearing with system crash, hang, and freeze. The error, with the default settings, compels a PC to reboot at once. On several occasions, after the restart, the Blue screen still appears and then you need to step forward to start the repair task. Cldflt.sys is such an error that can be seen in conjunction with different stop codes. These may be System Service Exception, Page Fault In A Nonpaged Area, Kmode Exception Not Handled, System Thread Exception Not Handled, and Kernel Data Inpage. In all cases, the BSOD shows What failed: Cldflt.sys which means the system crashed due to failure of this file.

In many cases, after restarting the computer, the Blue Screen still appears, and then the process of repairing it needs to begin. The Blue Screen can cause your system to crash, hang, and freeze.

How to fix cldflt.sys Windows 11 BSOD blue screen error. Blue screen is a headache that pops up with system crashes, hangs and freezes. The error, with default settings, forces the PC to restart at the same time. In some cases, after rebooting, the Blue screen still appears and then you need to continue to start the repair task. Cldflt.sys is an error that can be seen along with various stop codes. This can be a system service exception, an unpaged zone page fault, an unhandled kmode exception, an unhandled system string exception, and a kernel data page. In all cases, the BSOD shows What failed: Cldflt.sys, which means that the system failed due to the error of this file.

Several stop codes can be associated with a Cldflt.sys error. Among these are System Service Exceptions, Page Faults In Nonpaged Areas, Kmode Exceptions That Aren’t Handled, System Thread Exceptions That Don’t Take Effect, and Kernel Data Inpages That Don’t Take Effect. BSODs always indicate What failed: Cldflt.sys, meaning that the system crashed due to this file failing.

Why does cldflt.sys result in a blue screen of death?

Third-party software installed on your computer is the most common cause of Cldflt.sys BSODs. The cause can also be incompatible device driver versions in some cases. The Cloud Miniature Filter Driver files, which are used as drivers in Windows 11 and 10, can also cause this Blue Screen error if Windows updates fail, system files are corrupted, and malware is present. CLDFT.sys is the Cloud Miniature Filter Driver file.

What is the solution to the cldflt.sys blue screen error?

Run the system file checker (SFC)

Cldflt.sys Blue Screen Reddit

A CLDLFT.sys BSOD is mostly caused by third-party programs installed on your computer. The Blue Screen error can also be caused by incompatible device driver versions, faulty Windows updates, corrupted system files, malware presence, and incompatible system files. In Windows 11 and 10, cldflt.sys is a file used for Cloud Miniature Filter Drivers.

In response to the question, system file corruption is a wide-ranging process that can cause numerous errors. In relation to the question, this corruption occurs because of a conflict between Windows components and a faulty .sys file. A Blue Screen Of Death (BSOD) occurs when the computer is unable to start because of the system files. This error can, however, be fixed by following these steps:

Go to Start and click on it

2. Type cmd

You can now run a SFC scan by typing /scannow

You will receive the following message when you open the command prompt window:

Some system files have problems. Would you like them fixed now?

You will be prompted to press Y if yes is selected

Using the navigation bar, paste the following path.

Description: The original cldflt.sys is an important part of Windows and rarely causes problems. The file cldflt.sys is located in the C:\Windows\System32\drivers folder.
The file size on Windows 10/11/7 is 336,384 bytes.  The driver can be started or stopped from Services in the Control Panel or by other programs.
Cldflt.sys is a Windows core system file. The program is not visible. The file is a Microsoft signed file. There is no detailed description of this service.
cldflt.sys appears to be a compressed file.
Therefore the technical security rating is 0% dangerous.

6. Press Enter

You should now be able to restart the computer. Once you have closed command prompt, it should automatically close.

Updated: December 2023

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Perform a full scan using Window defender

You can protect your computer from malware attacks with the Windows Defender Security Center. It may warn you if it finds something suspicious. Sometimes, however, it does not detect anything dangerous at all. In such cases, a notification will appear that says “Windows Defender cannot protect your PC”. Usually, this occurs when some programs do not work properly with Windows Defender. Running a full computer scan should resolve this issue.

Press Enter after typing “defender” in the Start menu.

The problem started a few days ago when I tried to close programs using OneDrive for Business files. It shows OneDrive’s cldflt.sys causing SYSTEM_SERVICE_EXCEPTION errors in the event viewer.

You can then perform a deep scan by selecting Advanced options on the following screen.

Then, await the completion of the process.

The results of the scanning will appear in a list.

Follow the instructions displayed for each one after selecting it.

Reinstalling the program can be done from Control Panel by selecting Programs, and Features, then uninstalling the program and restarting your computer afterward.

System restore should be performed

The restore from disk method is useful if you’re experiencing slow performance, bugs, crashes, etc., and would like to regain your computer’s functionality from a specific point in time.

Using this function is as simple as following the steps below.

In the Start Menu, click on the Start button.

Enter “System Restore” into the search box.

3. Select the operating system you’d like to restore from the menu. Press Enter to start the restoration.

If you have installed the latest updates, you should choose the latest version of Windows to restore.

You can now restore your computer by clicking on the “Restore my computer” menu item.

The restoration process must be completed before moving on.

Your computer should be rebooted once you have finished this step.

Check to see if you’ve resolved the issue.

Fltmgr.sys Failed Reddit

Hi everyone. I was messing around with some stuff on my computer and something has happened which is causing my computer to crash 95% of the time that I try to get on. I have tried running command prompts, file repairs and everything I’ve seen through Youtube and things of that nature but nothing has worked. I was able to get the dump file if thats any good. I’m new to this stuff so I can’t read it myself and I’m currently looking for this fltmgr.sys file repair if theres any out there but all I have found and tried doesn’t work. I used a .dmp analyzer and this is what I got. I hope this helps you guys tell me whats wrong or if you know of any way to fix this issue. I would really appreciate the help because I’m really nervous that my father will get very angry over this.

Sometimes, Windows updates bring with them bugs that unexpectedly produce different errors. You know Windows 11, like Windows 10, regularly receives quality updates every month. This is developed to protect your system from everyday threats and fix previous errors. A buggy Windows update can cause a Cldflt.sys BSOD error. In this case, the main solution is to remove the update. You can uninstall Windows updates through a variety of methods, such as from Programs and Features, Settings, and Command Prompt. Here we are trying to provide the easiest method –

My laptop has been crashing when I move it from the table onto my lap with the error system_service_exception dxgmms1.sys. Hello, I am experiencing this problem. The computer I use for my work is about 4 years old and I recently upgraded to Windows 10 in order to remedy the problem.

When using Microsoft OneDrive, cldflt.sys encounters a stop error.

Install the latest device driver

The Cldflt.sys file is an essential file for your computer to function correctly. It is important for your PC to be updated with the latest versions of the Cldflt.sys driver in order to resolve this issue. You can resolve this issue by downloading and installing the Cldflt.SYS driver.

Here is how you can accomplish this:

Type “device manager” into the Search box under the Start button.

Choose “Update Driver Software” from the menu of the displayed icon by right-clicking on it.

The driver software can now be found by clicking Browse my Computer.

3. Select the correct driver for your Cldflt. Sys file from the list of devices that appear.

The correct driver will be selected and you will be able to click Next after selecting it.

Your computer should now be checked to see whether any changes have been made.

Make sure Windows is updated

Among the improvements in the new version are fixes for common problems such as Wi-Fi connectivity. However, the program still has some bugs. One of them is the “cldflt.sys blue screen” error. It occurs when specific programs are tried. If this occurs, you will get a blue screen of death. Nothing else can be done except reboot your computer.

The update included in the latest version of Windows 10 will resolve this issue. Within just a few minutes of downloading the update, you will be able to restart your PC.

Make sure that third-party programs are uninstalled

This error might be caused by some third-party application if you see an error like “Cldflt.sys Blue Screen”. Before you start troubleshooting, you must uninstall applications. Many people have trouble uninstalling apps because they don’t know how to do it properly, so here are a few steps to follow:

Click the Start Task Manager option within Windows Task Manager, after pressing the Ctrl+Shift+Esc keys together.

You can end the Keepass.exe process by choosing the End task option under the Processes tab.

Select Keepass OneDrive Sync under Programs & Features, and then click Remove.

Next, you must delete the KeepassBackup_.bak backup file from the folder where your database files are stored.

Your computer should be restarted after you have deleted the backup file.

RECOMMENATION: Click here for help with Windows errors.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.