How to fix cldflt.sys blue screen error on Windows?

Hello dear! I am dealing with cldflt.sys blue screen error on my PC. I can’t understand what lead into this issue and how to get rid of it. Please help me out of it. Any advice would be highly appreciated.

Windows is the praised because of its user friendly interface, customization ability, built-in troubleshooters and more. To works smoothly, it relies on thousands of running processes on the background.

When any of the processes go rogue, people receive BSOD or Blue Screen of Death. It appears seemingly out of nowhere and interrupts their computing activity. It occurs when there is certain issue with the computer’s hardware or other issues with its drivers. Software can also be the reason why the BSODs errors occur.

Very recently, people have reported about cldflt.sys blue screen error cldflt.sys. The particular BSOD error can occur due to different possible reasons. First of all, Steam folder being synced with OneDrive might be the reason the issue appears.

Another reason is that the problem is the interruption in the process caused by third party security software. Lastly, you may see the issue when the BIOS version is not updated. The three solutions below are their remediation that would surely help you in getting rid of the issue:

Possible fixes for cldflt.sys blue screen error

Fix 1: Move the Steam Games folder

If you are using Steam and OneDrive you should go through this step as the possible reason for the issue to appear could be that the Onedrive is trying to rapidly sync any files that are changing while you play game on Steam. The required solution in that very case is to move the Steam Games folder into a folder not being synced to OneDrive:

  • Open your steam client’s settings menu,
  • Now, from the Downloads tab, select Steam Library Folders,
  • Create a new path by selecting + button and once done, all the further installations could be installed there,
  • Just click on …… button and select Make Default to set it to the Default,
  • If you want to move the existing game without uninstalling it, then find the game in your Library you want to move, right-click on the game’s title and go to Properties,
  • Now, on Local Files tab, select Move Install folder… and from the drop-down menu, select the Steam Library folder location.

Fix 2: Uninstall Third-party Security Software

You might receive blue screen error cldflt.sys because of misbehaving ESET driver. Below, we have provided the complete guide how you can correctly remove ESET:

  • Go to the ESET Website and download the ESET AV Remover,
  • Now, Start PC in Safe Mode. For this, click on Start> Power, hold the Shift key and then select Restart, navigate to Troubleshoot> Advanced Options>Start settings and then click Restart again,
  • After the restart, press 5 on your keyboard to select Safe Mode with Networking,
  • Now, in the Safe Mode, double-click on the installer file, read its warning and type Y to confirm,
  • Review the items now that is listed on the installed ESET products, type the number of the corresponds to the ESET installation that you should uninstall and then click on the Enter key,
  • Verify that you are uninstalling the correct ESET product and type y to confirm,
  • Once the uninstaller tool completes its operation, press any key to exit the window,
  • Run the ESET Uninstaller again till no longer items are listed under installed ESET products,
  • Restart your computer in Normal Mode the then and check if the problem continues.

Fix 3: Upgrade BIOS

Find the version of your BIOS at first. If you do not know, here is how you can proceed with (remember that the process can differ for each manufacturer and we are here providing you the steps for Dell):

  • Type on your browser and hit Enter,
  • On the opened page, hover over the Support option,
  • In the displayed drop-down menu, click on Support Home,
  • Scroll down to find Downloads & Drivers and open it,
  • Now, either enter the required information according to your model number manually or download the SupportAssist to detect the essential information automatically.

Now, scroll down to find BIOS category drivers and expand it. Now, open start menu, type System Information and open it, and then compare the BIOS Version/ Date in the System Information with the version number specified on the official website.

Now, begin the download and once the download is complete, double-click on the downloaded file to open it. Once opening, you will receive a warning message that updating the BIOS process will reboot the system. Click OK button.

Next, another information dialog appears which indicates the current version of the BIOS and the version you are installing. Click on OK button therein and the system will begin the BIOS updating process. Once it reaches 100%, a black screen appears and after the updating process complete, the system reboot takes place. Once after the reboot, confirm that the latest BIOS version is installed.


That’s all! We have provided all possible fixes for cldflt.sys blue screen. Hope so, these fixes are helpful for you in getting the required fix.  If none of the methods work, you should use PC Repair Tool to check for PC related issues to get their automatic fix.