Quick Fix Guide for STOP 0x00000014 Error

What Is STOP 0x00000014 Error?

0x00000014 error is actually an error that is always displayed on a STOP message.

It is also known as Blue Screen of Death, abbreviated as BSOD. When this error occurs, the message that is displayed to the user either says ‘STOP: 0x00000014’ or states ‘CREATE_DELETE_LOCK_NOT_LOCKED’. It is crucial to fix this error to ensure your program is functioning appropriately. If this error message is not rectified, you might be opened to other error messages, such as error code 0x000000d1

Solution

Restoro box image
Error Causes

As far as the causes of STOP 0x00000014 error are concerned, this error usually occurs when a device driver or hardware problem occurs. This error may also occur if users attempt to run some specific application or update or modify an existing application. When a 0x00000014 error occurs, the operating system restarts to disable the PC from performing any further.

Without taking into consideration the causes of its occurrence, it is crucial to make sure that the 0x00000014 error is fixed as soon as possible to eliminate any undesired inconvenience in the future.

Further Information and Manual Repair

A lot of times when an operating system tries to recover from the STOP 0x00000014 error, the user is prompted that Windows has recovered from an unexpected shutdown.

However, if Windows fails to recover on its own, manual repair has to be performed.

While there are several ways this error can be fixed, some of the most effective and efficient ways of troubleshooting the 0x00000014 error are listed below as follows.

  • Restart your computer. Often simply restarting the computer can help eliminate the problem.
  • If restarting the system doesn’t help, find if you have recently modified or altered any hardware or driver. It is possible that the 0x00000014 error has been caused by the recent modification. Undo the changes and find out if the error occurs again. If it doesn’t, it is highly likely the issue has been resolved.

However, if the error persists, some solutions that may work are outlined below.

  • Start your system using the Last Known Good Configuration. This will undo any changes in the driver and recent registry.
  • Another solution is to manually perform System Restore. This will also return the system back to its former state.
  • Another idea that my work is to use roll back the device driver. When the driver will return to its previous version, the problem will easily be resolved.

To keep the 0x00000014 error from occurring in the future, it is advised to unplug any newly installed hardware or reinstall any deleted software.

If you're not tech-savvy and wish to get this error code rectified in a jiffy, download a powerful automated tool and perform a computer scan.

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How to Fix the D3dx9_32.dll Error Code

D3dx9_32.dll Error - What is it?

D3dx9_32.dll is basically a type of dynamic link library used to load and run different programs on the PC. The D3dx9_32.dll error message pops on the screen when this file is unable to load successfully. The error message is displayed in either of the following formats on the computer screen:
"The file d3dx9_32.dll is missing" "D3DX9_32.DLL is missing. Replace D3DX9_32.DLL and try again." "File d3dx9_32.dll not found" "D3dx9_32.dll not found. Reinstalling might help fix this." "Missing component d3dx9_32.dll"
This error usually pops while using gaming software. The D3dx9_32.dll error is displayed after a game is loaded or before the game-play begins. However, it may also appear in software that uses advanced graphic features.

Solution

Restoro box imageError Causes

D3dx9_32.dll error may occur due to multiple causes. These include:
  • The problem is related to Microsoft DirectX software. This software includes the D3dx9_32.dll file in its software collection.
  • Incompatible Video Card Drivers
  • Improper game installation
  • DLL File Corruption
  • Registry issues
  • Viral infection

Further Information and Manual Repair

To avoid inconvenience, it is advisable to fix the error right away. To resolve it you don’t need to be a technical whiz or hire a technician. Luckily, the D3dx9_32.dll file error is quite easy to fix. Here are some of the best and effective DIY methods that you can try to remove the error:

Method 1 - Install the Latest Version of DirectX

Since D3dx9_32.dll error is related to DirectX software, it is advisable to make sure that you have the latest version of this software installed on your PC. To install the updated version, simply go to Microsoft’s official website, download the software from there and install it on your PC. To activate changes, restart your computer.

Method 2 - Uninstall and then Re-install Gaming Application

If the error still persists, then the reason for it could be the gaming application. Sometimes D3dx9_32.dll error may also occur due to poor program installation. Therefore, in this case it is recommended that you first uninstall the program by going to the Add/Remove program option. And once the program is uninstalled, try re-installing it on your PC. Hopefully, it will remove the error.

Method 3 - Restore the Damaged/Corrupt D3dx9_32.dll File

The error may also pop due to the damaged or corrupt D3dx9_32.dll file. This indicated registry issues. When the registry becomes overloaded with unnecessary and obsolete files, there is not enough space for other files to store. Due to the poor registry maintenance, the system and dll files are often damaged. To restore the damaged D3dx9_32.dll file, you need to clean the registry first. You can do this manually, but that will be quite time-consuming and slightly technical. Therefore, download a registry cleaner. A registry cleaner scans all registry-related errors and removes them right away. It cleans the registry and restores the damaged dll files.

Method 4 - Scan for Viruses

If the D3dx9_32.dll error is triggered by viruses, then it is advisable to scan your PC with an antivirus. It will scan and removes all viruses from your system. Whether D3dx9_32.dll error is related to registry issues or viral infection, download Restoro. It is a cutting-edge, advanced, and multi-functional PC Fixer. A one-stop solution for all PC-related issues. It is deployed with a powerful registry cleaner, an antivirus, a system optimizer and several other scanners. The registry cleaner detects and removes all registry errors and repairs damaged Dll files including D3dx9_32.dll file and simultaneously the antivirus utility scans your entire PC for all types of malicious software infecting your system including spyware, Trojans, adware and malware. The system optimizer feature ensures your PC works at its optimal level. Restoro PC Fixer is safe and efficient. It has a user-friendly interface which makes it quite easy for all levels of users to operate. In just a few simple clicks, errors are resolved. In addition to this, you can download it on all Windows PC. It is compatible with all Windows versions. Click here to download Restoro and resolve D3dx9_32.dll error code on your PC today.
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Fix Call of Duty 4 crashes in Windows 10
Call of Duty is a fun and good game, a great time killer with a squad of friends, however sometimes the game crashes, and fun is interrupted. In this guide, we will address and solve this unpleasant issue.
  1. Scan game files

    inside launcher choose options and under them, choose scan and repair game files This process can take 5-30 minutes, as the game is 60GB large. This will look through all your game files and make sure they’re all valid and that none are corrupted, which may cause crashes. When it’s complete, you’ll get a notification that the game is now playable. Try again and see if your crashes continue.
  2. Update drivers

    Keeping drivers updated is crucial for the game to run smoothly, GPU drivers are possibly important. Go to your GPU manufacturer's website and get the latest drivers.
  3. Lower graphic settings

    Intensive graphic requirements can overload GPU and cause crashes, try lowering details in-game and see if this will fix the issue.
  4. Disable overlays

    If you’re using a program like Discordthat has an overlay, you’ll want to disable it as it may be causing the graphic error
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There is insufficient disk space to ...
If you are trying to copy a folder or file in your Windows 10 computer but encountered an error that says, “There is insufficient disk space to complete operation”, then you’ve come to the right place as this post will walk you through how you can fix the error. This kind of problem could be due to lack of disk space, corrupted disk, and many more. In such cases, this error usually pops up when you move or copy a file or folder to a particular location. There are several potential fixes you can check out to fix this error. You can try to run the Storage Sense or Disk Cleanup or try copying or moving the file in a Clean Boot State. You could also try formatting the given partition to NTFS. For more information, refer to each one of the options provided below.

Option 1 – Try to delete the temporary files

The error could be caused by some temporary or junk files in your computer and so you need to clear them up to fix the problem. You can achieve that using the Storage Sense feature.
  • Open Setting > System > Storage from the WinX Menu.
  • From there, you will see a list of all the local and connected storage devices along with the details on the free space. Make sure that Storage Sense is on.
  • Next, find a link that says “Free Up Space” and click it to open.
  • After that, a screen which is the built-in program in Windows 10 will appear and will scan your computer for the following junk files so you can free up disk space:
    • Windows Upgrade Log Files
    • The system created Windows Error Reporting Files
    • Thumbnails
    • Temporary Internet Files
    • Previous Windows Installation Files
    • Delivery Optimisation Files
    • DirectX Shader Cache
  • Choose the files you want to get rid of and then click on the remove files option. Note that you’ll have an idea of the total size as you select any of the junk files listed above.
  • Now go to the “Free Up Space Now” section and click the Clean now button. This will get rid of all the temporary or junk files in your computer and should hopefully fix the “There is insufficient disk space to complete operation” error.

Option 2 – Restart your computer in a Clean Boot State

If the first options didn’t work and you still see the “There is insufficient disk space to complete operation” error when you copy folder or files, you can try putting your computer in a Clean Boot State and then again.
  • Log onto your PC as an administrator.
  • Type in MSConfig in the Start Search to open the System Configuration utility.
  • From there, go to the General tab and click “Selective startup”.
  • Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
  • Next, click the Services tab and select the “Hide All Microsoft Services” check box.
  • Click Disable all.
  • Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
  • Now try to connect copy the folder or file once more and check if the error is now gone.

Option 3 – Try formatting the given partition to NTFS

Even though this option may take a lot of your time, it is proven to fix the “There is insufficient disk space to complete operation” error as reported by many users who also went through the same dilemma. So if the removable disk is showing the same error message no matter which computer you insert it, you might have to format the drive with the help of Command Prompt. But before you do that, you must know that all the contents of your drive will be permanently deleted after you format it.
  • Tap Win + R to launch Run.
  • Type in cmd and then tap Enter or click OK to open the Command Prompt.
  • And in the elevated window of Command Prompt, type in the following command:
format F: /fs:ntfs
In the command given above, “F” is the drive letter and “NTFS” is the file system you want. Just remember to replace “F” with the drive letter you want to format as well as the file system you prefer. Brace yourself as this process might take quite a while even if you only have a 4 GB USB drive – so you must not close the window under any circumstances as the drive might get corrupted and wait for the process to finish.
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Stop showing browser tabs when alt+tab, Win11
windows browser tabs removed alt tabAs in previous Windows 10, inside Windows 11 also when you press the ALT + TAB key combination you will get a preview of all running applications along with all Browser tabs so you can go through them and pick the one you want to switch to. Alto, I personally am a big fan of alt-tabbing, I must admit that I am not a big fan of having multiple browsers tabs on screen when I do press key combo. Luckily there is a very easy way to turn this feature off. Turning browsers tabs thumbnails off
  1. Press ⊞ WINDOWS + I to open settings
  2. Click on System in the sidebar
  3. Scroll down and select Multitasking
  4. Find Alt + Tab section and click on the drop-down menu
  5. Pick Open Windows Only
  6. Close settings
Now when you press the ALT + TAB key combination you will still see your browser but only an active tab in it instead of all tabs as different preview thumbnails.
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Fix Windows Update Error 0x80242006
If you are trying to update your Windows 10 computer using Windows Update but encounter an error code 0x80242006, then you’ve come to the right place as this post will guide you in fixing this particular Windows Update error. This kind of error might be due to mishandling by the operating system. It could also be caused by the antivirus program or security software installed in your computer. When you encounter this error, you will see the following error message on your screen as you try to run Windows Update:
“0x80242006, WU_E_UH_INVALIDMETADATA. A handler operation could not be completed because the update contains invalid metadata.”
Here are some troubleshooting tips you can try to fix Windows Update Error 0x80242006.

Option 1 – Try to reset the Windows Update components

If by any chance that the second option didn’t work, resetting the Windows Update components could also help you resolve the problem. How? Refer to the following steps:
  • Open Command Prompt with admin privileges.
  • After that, type each one of the following command and hit Enter after you key in one after the other.
    • net stop wuauserv
    • net stop cryptsvc
    • net stop bits
    • net stop msiserver
Note: The commands you entered will stop the Windows Update components such as Windows Update service, Cryptographic services, BITS and MSI Installer.
  • After disabling WU components, you need to rename both the SoftwareDistribution and Catroot2 folders. To do that, type each one of the following commands below and don’t forget to hit Enter after you type one command after the other.
    • ren C:WindowsSoftwareDistribution SoftwareDistribution.old
    • ren C:WindowsSystem32catroot2 Catroot2.old
  • Next, restart the services you’ve stopped by entering another series of commands. Don’t forget to hit Enter after you key in one command after the other.
    • net start wuauserv
    • net start cryptsvc
    • net start bits
    • net start msiserver
  • Close Command Prompt and reboot your PC.

Option 2 – Run the Windows Update Troubleshooter

If resetting the Windows Update components didn’t work, you could also try running the Windows Update Troubleshooter as it could also help in fixing any issues related to Windows Update including this one. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 3 – Try to disable your antivirus program

Disabling the antivirus program or any security software installed in your computer is always a good idea you can try when the Windows Update process does not go smoothly. So before you try updating your computer again, make sure to disable the antivirus or security program and once the Windows Update is done, don’t forget to enable the antivirus program back again.

Option 4 – Check the Background Intelligent Service and the Cryptographic Service

  • Tap the Win + R keys to open the Run dialog box.
  • Next, type “services.msc” in the field and hit Enter or click OK to open Services.
  • From the list of Services, look for the following services and make sure that their Startup type is as follows:
    • Background Intelligent Transfer Service – Manual
    • Cryptographic Service ­– Automatic
  • After that, check if the Service status of the listed services above are set to Running. If they’re not, click on the Start button to start these services and then check if you can now enable the Windows Update service or not.

Option 5 – Run the System File Checker Scan

System File Checker or SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files to good system files. To run the SFC command, follow the steps given below.
  • Tap Win + R to launch Run.
  • Type in cmd in the field and tap Enter.
  • After opening Command Prompt, type in sfc /scannow
The command will start a system scan which will take a few while before it finishes. Once it’s done, you could get the following results:
  1. Windows Resource Protection did not find any integrity violations.
  2. Windows Resource Protection found corrupt files and successfully repaired them.
  3. Windows Resource Protection found corrupt files but was unable to fix some of them.
  • Restart your computer.

Option 6 – Try running the DISM tool

You can try running the Deployment Imaging and Servicing Management or DISM tool to fix the Windows Update error 0x80242006. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth”.
  • Open the Command Prompt with admin privileges.
  • Then type in the following commands and make sure to hit Enter right after you type each one of them:
    • Dism /Online /Cleanup-Image /CheckHealth
    • Dism /Online /Cleanup-Image /ScanHealth
    • exe /Online /Cleanup-image /Restorehealth
  • After that, wait until the process is finished and do not close the window as the process will probably take a couple of minutes.
  • Once it’s done, restart your computer.
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Change Legacy to UEFI without reinstalling
There are some new generation motherboards for laptops and PCs that bring in support for both the Unified Extensible Firmware Interface or UEFI as well as the Basic Input Output System or BIOS. The main advantage of UEFI over the traditional BIOS is the fact that UEFI supports a hard drive that has a capacity of more than 2 terabytes. However, the disadvantage of UEFI is that it only supports the x64 Windows operating system versions and that the hard drive is supposed to use the GPT structure. So if your PC is compatible with and supports UEFI and you want to change from Legacy to UEFI, then you’ve come to the right place as this post will guide you on how you can exactly do that without having to reinstall it. There are two ways to change Legacy to UEFI. You can convert MBR to GPT using either the built-in utilities in Windows or using the Recovery Environment. Before you proceed, make sure that your computer fulfills the following prerequisites:
  • Your PC’s motherboard should support both Legacy and UEFI.
  • Your PC should be running at least the 1703 Windows 10 version or newer on an MBR partition.
Once you’ve made sure that your computer covers the aforementioned prerequisites, refer to the given options below.

Option 1 – Convert MBR to GPT via Windows built-in utilities

  • In the Windows Search box, type “command prompt” and from the search results that appear, right-click on Command Prompt and select the “Run as administrator” option.
  • After that, execute this command: exe /convert /allowfullOS
  • Now, wait until the process is completed since you can track its process on your screen.
  • Once it’s done, go to Settings > Update & Security > Advanced Startup options and from there, click on Restart Now. This will restart your computer and give you advanced options.
  • Next, select Troubleshoot > Advanced Options where you will see further options including System Restore, Startup Repair, Go back to the previous version, Command Prompt, System Image Recovery, and UEFI Firmware Settings.
  • Now select the UEFI Firmware Settings. This will take you to the BIOS. Boot Mode is typically available under Boot > Boot Configuration. Once you’re there, set it to UEFI and then save the changes you’ve made. After that, your computer will restart.

Option 2 – Convert MBR to GPT via the Recovery Environment

  • When the message appears on your screen while running Windows Setup, you need to tap the Shift + F10 keys to open Command Prompt.
  • Make sure to run Command Prompt as admin and then execute this command: exe /convert
  • After that, wait until the process is completed. When it’s done, you have to go to the BIOS just like in the first given option above.
  • As mentioned, you can usually find the Boot Mode under Boot > Boot Configuration. Once you’re there, set it to UEFI.
  • Now save the changes made and exit as your computer will restart.
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Fix Some apps need to be uninstalled
When you update or upgrade your computer to Windows 10, the setup will look for the compatibility of both the hardware and software. And in this process, if suddenly got an error message saying, “Some apps need to be uninstalled” or “You need to uninstall a program in order to continue”, you have to look for the program(s) that might be causing the compatibility issues. But worry not as this post will help you resolve the issue. Simply follow the given suggestions below.

Option 1 – Look for the incompatible programs

There are times when Windows 10 will point out the programs that are incompatible with Windows 10. In this situation, just click on the Uninstall and continue button and then wait for the process to be completed. For more information, you can check out the official site Ready for Windows by Microsoft. This site can help you determine which software versions are compatible with Windows 10 and which ones are not. All you have to do is select the Windows 10 version and type your App name, after that, you will see the results about its compatibility. Thus, it’s now easier for you to figure out which software is causing an issue and if there is a new updated version available that you can install instead.

Option 2 – Try to install the Windows Update in a Clean Boot State

Putting your PC in a Clean Boot state can also help you install Windows Updates or Upgrades without any trouble because, during this state, you can start the system with a minimum number of drivers and startup programs that will surely help you in isolating the root cause of the issue.
  • Log onto your PC as an administrator.
  • Type in MSConfig in the Start Search to open the System Configuration utility.
  • From there, go to the General tab and click “Selective startup”.
  • Clear the “Load Startup items” checkbox and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
  • Next, click the Services tab and select the “Hide All Microsoft Services” check box.
  • Click Disable all.
  • Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
  • After that, try to install the Windows Updates or upgrade again.

Option 3 – Try creating a new user account

Creating a new user account can resolve the “Some apps need to be uninstalled” error when upgrading or updating your Windows 10 PC. All you have to do is create a new admin account and initiate the setup. And this is a new user account, there will be no third-party applications installed on your computer. Thus, the installation should go through without any trouble. And in case you’ve already installed programs for that user, you just have to uninstall them all and then re-run the setup.

Option 4 – Perform a clean install

If none of the options worked, you can try to clean install Windows 10. Just make sure that you have the ISO from the official Microsoft Website and then a bootable USB drive to install Windows 10 again. Take note that this will delete all the data from your drive where Windows 10 was installed previously.
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Tailor Made Solution For Windows AppCrash Error

What is AppCrash Error?

As the name implies the AppCrash error is an error code that indicates a crashed program/application on your system. This term is used by Windows to designate an application crash. It is reported and displayed on the system as “Problem Event Name: AppCrash,” which is followed by additional technical information which unless you are a computer programmer, you may not fully decode. There are various symptoms that trigger the occurrence of this error code on your system such as:
  • Application becoming unresponsive and intermittent
  • Momentary application freezing
  • Application times out and then successfully recovers itself

Solution

Restoro box imageError Causes

The reason for AppCrash error occurrence cannot be narrowed down to a specific cause. This error code is triggered by multiple causes such as:
  • The system is stressed out. This happens when your CPU is held at 100% usage for an unacceptable length of time.
  • Lack of system resources
  • Windows version incompatibility with the application
  • Malware and viral infection
  • Poor PC maintenance
  • Registry damage and corruption
  • Data overload
No matter what the cause for the AppCrash error may be, if you experience this error on your system you must repair it right away before the damage sets in. This is a serious error posing severe consequences. If not repaired on time, it not only hampers your ability to use your desired application but also exposes your PC to fatal crashes, data loss, and system failure.

Further Information and Manual Repair

Though this is a serious Windows error, the good news is that it is an easy-to-fix error code, so resolving it is not a problem. There are three ways to fix the AppCrash error:
  • Hiring a technician, this by the way is quite costly. You may have to pay hundreds of dollars to get professional assistance to fix this error code.
  • Giving your computer adequate rest to cool down. Stressing out your PC heats the hardware which triggers such errors and eventually results in system failure. Try cooling it, and see if it fixes the error.
  • Downloading Restoro. This is by far the best, simple, quick, and money-saving way to resolve the AppCrash error on your system. Restoro is an innovative, performance-driven and multi-functional user-friendly PC Fixer that helps resolve practically all types of PC-related errors including the AppCrash error. It has an intuitive and powerful in-built registry cleaner which scans and detects all types of registry issues on your PC in seconds. It helps you clear up all the unnecessary files saved on your hard disk like junk files, internet history, invalid entries and files from the programs that you’ve uninstalled. Such files not only occupy a lot of disk space but they also lead to registry damage and corruption thus shooting error code pop-ups like the AppCrash error.

Restoro features

Restoro performs an in-depth scan and removes all these files cluttering the system and repairs the damaged registry. It resolves the error AppCrash and simultaneously boosts the speed of your PC making it easy for you to access and run applications fast and smoothly without any application errors. Sometimes malicious software programs like malware and viruses may also damage and corrupt the registry. If the underlying cause of the AppCrash error is a viral infection on your PC corrupting the registry, then don’t worry; Restoro, with the help of its built-in anti-virus program, resolves it too. It scans for viruses on your system and removes them immediately. Restoro is easy to use. Whether you are a novice or an experienced user, working around this PC Fixer is simple. It has a user-friendly interface that allows users to navigate through it without any hassle. In addition to this, it offers enhanced compatibility. It smoothly runs on all Windows versions.

Get Restoro

To get started, all you need to do is Click here to download Restoro. Once it is installed on your system, run it to scan for registry issues like the AppCrash error. This intuitive tool will detect all the errors on your PC in just a few seconds and display them on your Windows screen in the form of a comprehensive scan report. Now simply hit the repair tab to resolve. Once repairing is successfully complete, try running your desired application. You will notice two significant differences:
  1. No AppCrash error code message pop-ups
  2. The application runs fast and smoothly regardless of whether it’s Windows Media Player or any gaming application.
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Fix Error Code 0xc0000225 in Windows 10
Error 0xc0000225 is the error that occurs on system startup, most times error just disappears all by itself but in some cases, it can be really persistent and can even cause you not to be able to enter the system that could be a really annoying thing, especially if there is some important task waiting to be finished. In this guide, we will present you with solutions for this error and how to solve it so you can get back to work as soon as possible.

Solution if you can not log into windows due to repeating error

If an error repeats itself constantly and you are unable to boot into Windows itself you will need to prepare Windows boot USB. You can download the Microsoft media creation tool here and then use it to create a bootable USB with Windows 10. Once the USB is done reboot your system and boot from USB. CHoose repair Windows instead of install and follow onscreen instructions.

Solution if you can log into Windows

If you can log into Windows bring up the command prompt in administrator mode and type in it SFC /SCANNOW followed by ENTER, wait for the whole operation to finish, and then reboot the system.
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Fix MOZILLA_PKIX_ERROR_MITM_DETECTED
If you’re having some problem browsing multiple websites on the Firefox browser on your Windows 10 computer, then this post might be of help. One of the most common problems you could encounter in Firefox is mostly related to HTTPS and one of them is the MOZILLA PKIX ERROR MITM DETECTED or ERROR SELF SIGNED CERT or SEC ERROR UNKNOWN ISSUER error which means that Firefox was unable to trust certificates issued on secured websites. If you encounter the MOZILLA_PKIX_ERROR_MITM_DETECTED error in Firefox, this indicates that something in your network or system is interrupting your connection and injecting certificates and when that happens, Firefox won’t trust it. In such cases, one of the culprits is malware. Malware will try to replace a legitimate certificate with its certificate. Another cause is security software where it keeps a tab on a secure connection and creates a false positive, for instance:
“In Microsoft Windows accounts protected by Family Safety settings, secure connections on popular websites like Google, Facebook and YouTube might be intercepted and their certificates replaced by a certificate issued by Microsoft in order to filter and record search activity.”
And if you are connected to a corporate network, there might be a monitoring/filtering product that could be replacing certificates. Moreover, there are also users who reported getting this issue when they use the Nightly version of Firefox. And if that’s the case, you have to try accessing secure websites using only the stable build especially when it comes to payments. However, if you are not doing that, then here are some options you need to check out.

Option 1 – Try turning off HTTPS Scanning on your security and antivirus programs

Each security-based software has a security option that allows you to turn off the HTTPS scanning functionality. They may be available under different names such as HTTPS Scanning, Scan SSL, Show safe result, Do not scan encrypted connections, etc. Find what is applicable for your security or antivirus software and then try turning it off temporarily and see if it helps in fixing the MOZILLA_PKIX_ERROR_MITM_DETECTED error in Firefox.

Option 2 – Try to disable security.enterprise_roots.enabled

The next thing you can do if the first option didn’t work is to disable security.enterprise_roots.enabled which is an HTTPS certificate check on Firefox. Note that this is not recommended but you have to at least try in order to fix the error.
  • Open Firefox and then type “about: config” in the Firefox address bar and hit Enter.
  • After that, if an info message appears, confirm it.
  • Next, search for the security.enterprise_roots.enabled preference and once you found it, double click on it.
  • Then change its value to true and restart the Firefox browser once. This will import all the custom certificates from the other security software into Firefox. As a result, it will make sure to mark those sources as trusted and you won’t get the MOZILLA_PKIX_ERROR_MITM_DETECTED error.
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