What is coieplg.dll error?
Coieplg.dll file belongs to Norton Confidential or Norton Internet Security developed by Symantec Corporation. The associated files of coieplg.dll contain acctmgr.dll, NppBho.dll, bbif.dll, nppw.dll and cwdefscn.exe. Lists of system problems can possibly result in coieplg.dll error, including damaged or missing coieplg.dll, coieplg.dll install failure, incompatible version of coieplg.dll, corrupt coieplg.dll removal/repair failure, driver update failure, missing or damaged driver files, incompatible version of driver files, disabled driver files and obscure registry problems.

Why to fix coieplg.dll error efficiently?
Coieplg.dll error has the ability to lead to multiple system problems.
Drastic decrease of system performance
Unexpected Blue Screen of Death errors
Black Screen of Death errors
Norton Internet Security uninstall/install failure
Third- party application removal failure
Software instability
Increasing times of Norton Internet Security crashes
Norton Internet Security update failure

Common coieplg.dll error messages:

Coieplg.dll Not Found
This application failed to start because coieplg.dll was not found. Re-installing the application may fix this problem.
Cannot find [PATH]\coieplg.dll
The file coieplg.dll is missing.
Cannot start [APPLICATION]. A required component is missing: coieplg.dll. Please install [APPLICATION] again.

How to fix coieplg.dll error effectively?
Solution One: Restore coieplg.dll from Recycle Bin
If you have wrongly removed coieplg.dll to the Recycle Bin, you can try to restore the file from it.

Solution Two: Re- register coieplg.dll file.
It is suggested to re- register coieplg.dll file under the circumstances that the file hasn’t been missing or damaged by cyber threat attacks, you may consider following the instructions listed below:
For Windows XP user:
Step One: Click Start, and then go to Run.
Step Two: Type cmd onto the latest dialog box and press Enter button to enable Command Prompt utility.
Step Three: Type regsvr32 coieplg.dll onto the Command Prompt window as soon as it pops up.
Step Four: Press Enter to confirm the modification.
For Windows 7 user:
Step One: Click Windows or Start if you are using Classic theme.
Step Two: Type cmd onto the latest search box above Windows menu.
Step Three: As soon as the Command Prompt appears on the screen, type
regsvr32 coieplg.dll
Step Four: Press Enter.

Solution Three: Replace it with a compatible one from cyber space.
Step One: Download the compatible version of coieplg.dll from network.
Step Two: Save it onto a hard disk. And then go to the folder C:\WINDOWS\system32.
Step Three: Locate the problematic version of coieplg.dll on your computer.
Step Four: Rename the current version of coieplg.dll with a name you like.
Step Five: Copy & paste the compatible version into the folder C:\WINDOWS\system32.
Step Six: Click Start and then head to Run.
Step Seven: Type cmd onto the latest pop- up and press Enter button to go into the Command mode. (In Windows 7, type cmd onto the latest search box above Windows menu.)
Step Eight: Type “regsvr32 coieplg.dll” onto Command Prompt and then press “Enter” button.

Solution Four: re- install Norton products.
For Windows XP user:
Step One: Click Start, go to Run, type appwiz.cpl onto the latest pop- up, and then click OK to enable Add or Remove Programs application.
Step Two: Find out Windows Defender and then scroll to it. Click Uninstall.
Step Three: Restart the computer to confirm the modification.
For Windows Vista and Windows 7 user:
Step One: Click Start, and in the Search programs and files text box, type Appwiz.cpl, and then press ENTER.
Step Two: Right-click Windows Defender, and then click Uninstall.
Step Three: Restart the computer to confirm the modification.

Solution Five: Fix registry problems
The Window registry is the essential part of Windows operating system. It is used to store settings and options for lower- level system components and third- party application that need to make use of Windows registry. Any unwanted or incorrect modification on Windows registry can possibly result in further severe system problems, including unexpected system shutdown, failure of third- party program to open, software instability and missing or damaged system files. To efficiently fix coieplg.dll error, you should firstly get rid of the undesirable registry problems.

A safe and efficient solution for the unwanted registry problems is to enable a reliable registry repair utility for your poorly optimized computer. A reliable registry repair utility combines with a superb collection of professional toolkits which have the ability to offer you comprehensive services to remove unneeded registry components, repair damaged registry files and fix obscure registry errors efficiently without any system file corruption. How to fix coieplg.dll error and get rid of registry errors totally and safely?

What is apphelp.dll error? Apphelp.dll stands for Application Compatibility Client Library of Microsoft Windows operating system developed by Microsoft Corporation. The associated files of apphelp.dll contain apphelp.dll.mui, AppHelper.dll, apphelperlib.dll and apphelp_xp.dll. The problems listed below can possibly lead to apphelp.dll:

Missing or damaged apphelp.dll
Apphelp.dll install failure
Incompatible version of apphelp.dll
Damaged apphelp.dll removal/repair failure
Driver update failure
Missing or damaged driver files
Invalid version of driver files
Cyber threat attacks
Unwanted registry components
Damaged or missing registry files

Why do you have to fix apphelp.dll error immediately?
Once your computer is experiencing apphelp.dll error messages, you may also consider solving a list of further undesirable system problems.
Substantial reduction in system performance
Unexpected Blue Screen of Death errors
Black Screen of Death errors with driver file details
Software instability
Third- party application uninstall failure
Windows files update failure
Increasing times of program crashes
Windows components removal failure
System security problems

Common apphelp.dll error messages:
Apphelp.dll Not Found
This application failed to start because apphelp.dll was not found. Re-installing the application may fix this problem.
Cannot find [PATH]\apphelp.dll
The file apphelp.dll is missing.
Cannot start [APPLICATION]. A required component is missing: apphelp.dll. Please install [APPLICATION] again.

How to fix apphelp.dll error efficiently?
Solution One: Re- register apphelp.dll file.
It is suggested to re- register apphelp.dll file under the circumstances that the file hasn’t been missing or damaged by cyber threat attacks, you may consider following the instructions listed below:
For Windows XP user:
Step One: Click Start, and then go to Run.
Step Two: Type cmd onto the latest dialog box and press Enter button to enable Command Prompt utility.
Step Three: Type regsvr32 apphelp.dll onto the Command Prompt window as soon as it pops up.
Step Four: Press Enter to confirm the modification.
For Windows 7 user:
Step One: Click Windows or Start if you are using Classic theme.
Step Two: Type cmd onto the latest search box above Windows menu.
Step Three: As soon as the Command Prompt appears on the screen, type
regsvr32 apphelp.dll
Step Four: Press Enter.

Solution Two: Replace it with a compatible one from cyber space.
Step One: Download the compatible version of apphelp.dll from network.
Step Two: Save it onto a hard disk. And then go to the folder C:\WINDOWS\system32.
Step Three: Locate the problematic version of apphelp.dll on your computer.
Step Four: Rename the current version of apphelp.dll with a name you like.
Step Five: Copy & paste the compatible version into the folder C:\WINDOWS\system32.
Step Six: Click Start and then head to Run.
Step Seven: Type cmd onto the latest pop- up and press Enter button to go into the Command mode. (In Windows 7, type cmd onto the latest search box above Windows menu.)
Step Eight: Type “regsvr32 apphelp.dll” onto Command Prompt and then press “Enter” button.

Solution Three: Or you can replace the apphelp.dll file with the original version. You can do this from Windows XP Recovery Console.
Here are the steps:
Step One: Insert Windows XP installation CD to your PC and then boot it.
Step Two: From Welcome to Setup, press R to enable Recovery Console utility.
Step Three: Choose the Windows XP installation you need to fix and complete the administrator password if it asks. Then the Recovery Console utility appears on the screen.
Step Four: Type cd system32 when command prompt pops up and press Enter to change to the system32 directory.
Step Five: Type ren apphelp.dll msderun.old.dll and press Enter to rename the apphelp.dll file.
Step Six: And then type CD-ROM_or_DVD-ROM_Drive_Letter: and press Enter to point to the CD-Rom drive. Here, CD-ROM_or_ DVD-ROM_Drive_Letter letter points to the drive letter of your CD_ROM or DVD_ROM drive.
Step Seven: Type cd \i386, and then press Enter to change to the i386 directory on the CD.
Step Eight: Type expand msderun.dl_ BootDriveLetter:\windows\system32 and then press Enter to change to extract the original apphelp.dll file from the Windows XP CD and copy it to the system32 directory on your Windows XP computer.

Solution Four: Keep Windows up- to- date.
The automatic Windows update is classified as a useful solution to get rid of apphelp.dll error for it can help the computer safely replace the problematic apphelp.dll file with an error- free copy:
Step One: Click Start.
Step Two: And then go to Control Panel.
Step Three: Enable the Windows Update utility.
Step Four: Follow the instruction to install AxtiveX and click “Install” to install Windows Update utility.
Step Five: Install all of the updates.
Step Six: Restart PC.

Solution Five: Fix registry problems efficiently.
The Windows registry is responsible for preserving system settings and options for Windows operating system, including kernel running situation, SAM, device driver details and third- party software. Unneeded registry components, missing or corrupt registry files and obscure registry errors can easily result in invalid Windows registry which is classified as the main reason for a list of annoying system problems, especially .exe file corruption. On purpose to fix apphelp.dll error, you should firstly get rid of registry problems.

How to get rid of registry problems totally? An efficient solution for undesirable registry problems is to enable a trusted registry repair tool on your computer. A trusted registry repair tool combines with a package of comprehensive and professional services that can help you efficiently get rid of undesired registry problems through completely wiping out unneeded registry components, repairing corrupting registry files and fixing obscure registry errors. How to fix apphelp.dll error and get rid of undesired registry problems easily?

What is LogonUI.exe error? LogonUI.exe file stands for Windows Logon User Interface and belongs to Windows Logon UI or Windows Logon User Interface Host of Microsoft Windows operating system developed by Microsoft Corporation. The associated files of LogonUI.exe contain winlogon.exe, cutildll64.dll, msvcrt.dll and credui.dll. There are multiple system problems can possibly lead to LogonUI.exe error, including missing or damaged LogonUI.exe, incompatible version of LogonUI.exe, corrupt LogonUI.exe removal/repair failure, driver update failure, missing or damaged driver files, invalid version of driver, disabled driver, cyber threat attacks and complicated registry problems.

Consequences of LogonUI.exe error: Windows log on failure
Unexpected Blue Screen of Death errors
Black Screen of Death errors with driver file details
Drastic decrease of system performance
Third- party application removal failure
Windows components removal/install failure
Windows file update failure
Cyber threat attacks
Software instability
Increasing times of program crashes

Common LogonUI.exe error messages: LogonUI.exe – Entry Point Not Found
The procedure entry point UnconstrainedDelegationEnabled could
not be located in the dynamic link library cutildll64.dll.

LogonUI.exe – Entry Point Not Found
The procedure entry point could not be located in the dynamic link library msvcrt.dll

LogonUI.exe – System Error
The program can’t start because credui.dll is missing from your computer. Try reinstalling the program to fix this problem.

How to fix LogonUI.exe error effectively? Solution One: Restore LogonUI.exe from Recycle Bin
If you have wrongly removed LogonUI.exe to the Recycle Bin, you can try to restore the file from it.

Solution Two: Disable LogonUI.exe from the Windows Task Manager
Step One: Press CTRL+ALT+DELETE to enable Task Manager on your PC.
Step Two: Click Processes.
Step Three: Locate and right-click the LogonUI.exe file.
Step Four: Click End Process.

Solution Three: Re- register associated .dll files of LogonUI.exe.
In order to fix LogonUI.exe error, you may consider trying to re- registering the associated .dll files of LogonUI.exe if they haven’t been damaged by any undesirable activity or compromised by malware. You can follow the easy instructions to re- register cutildll64.dll:
For Windows XP user:
Step One: Click Start, and then click Run.
Step Two: Type cmd onto the latest dialog box and press Enter button to enable Command Prompt utility.
Step Three: Type regsvr32 cutildll64.dll onto the Command Prompt window as soon as it pops up.
Step Four: Press Enter to confirm the modification.
For Windows 7 user:
Step One: Click Windows or Start if you are using Classic theme.
Step Two: Type cmd onto the latest search box above Windows menu.
Step Three: As soon as the Command Prompt appears on the screen, type
regsvr32 cutildll64.dll
Step Four: Press Enter.

Solution Four: Replace it with a compatible one from cyber space.
Step One: Download the compatible version of LogonUI.exe from network.
Step Two: Save it onto a hard disk. And then go to the folder C:\WINDOWS\system32.
Step Three: Locate the problematic version of LogonUI.exe on your computer.
Step Four: Rename the current version of LogonUI.exe with a name you like.
Step Five: Copy & paste the compatible version into the folder C:\WINDOWS\system32.
Step Six: Click Start and then head to Run.
Step Seven: Type cmd onto the latest pop- up and press Enter button to go into the Command mode. (In Windows 7, type cmd onto the latest search box above Windows menu.)
Step Eight: Type “regsvr32 LogonUI.exe” onto Command Prompt and then press “Enter” button.

Solution Five: Fix registry problems.
The damaged Windows registry has the ability to trigger various types of system problems, including unexpected Blue Screen of Death error, drastic decrease of system performance, undesirable .exe file corruption and increasing times of network connection disrupt. To efficiently fix LogonUI.exe error, you may consider firstly getting rid of the damaged Windows registry.

How to fix registry problems efficiently without damaging critical system files? A perfect solution for the problems is to enable a trusted registry repair tool on your computer. A trusted registry repair tool combines with a package of comprehensive services that can completely wipe out undesirable registry components, fix obscure registry errors and repair corrupt registry files. How to fix LogonUI.exe error and get rid of registry problems easily?