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What is the coIEPlg.dll component needed for?

Simply stated, a DLL file is an unnamed executable file. It cannot be directly invoked, but it can be called by any executable Windows program.

The coIEPlg.dll process is also known as coIEPlugIn and is a part of Norton Internet Security (Version 2006) or, as the case may be, Norton Confidential. This software is produced by Symantec (www.symantec.com). An obsolete or defective version of coIEPlg.dll can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about coIEPlg.dll coIEPlugIn

coIEPlg.dll is not a Windows system file and is known to frequently cause computer problems. The file coIEPlg.dll is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 436,152 bytes (13% of all these files), 378,736 bytes as well as 41 other variants.
This DLL file is a browser plug-in. This could mean that your Internet Explorer has been given additional useful capabilities. However, not all such plug-ins are worthwhile. Some just display advertisements or surreptitiously change your browser settings. The unique identifer of the browser plug-in is 602ADB0E-4AFF-4217-8AA1-95DAC4DFA408 or, as the case may be, F0DA78E9-6B60-42fb-BC26-EF2CFB8C8FF3 or, as the case may be, B8E07826-0971-4f16-B133-047B88034E89 or, as the case may be, AB4C7833-A6EC-433f-B9FE-6B14B1A2F836. This particular software does not have a visible window, and does not appear on the taskbar. This file can analyze your Internet behavior, since it acts like an Internet Explorer plug-in. The original file has been signed by a trusted signature authority. This lets you check your copy to see if it is a counterfeit. The file does not come from Microsoft and is not part of the operating system. The original file is digitally signed. Check your file. For this reason, 33% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

A coIEPlg.dll file has a 29% certainty of being dangerous if it is found in a subdirectory of "C:\Program Files\Public Documents". In this case, the file size is usually 357,744 bytes (43% of all these files), 349,552 bytes or, as the case may be, 316,784 bytes. This particular software does not have a visible window, and does not appear on the taskbar. It contains a digital signature from Verisign, a subsidiary of Symantec. Verisign thereby confirms this file's authenticity and integrity. The file can analyze your Internet behavior, since it acts like an Internet Explorer plug-in. CoIEPlg.dll has a digital signature. This confirms that the producer has been registered with a certificate authority. It was developed by a so-called third party provider - and not by Microsoft.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves coIEPlg.dll. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about coIEPlg?

Norton Internet Security 2010
Norton system file
is Norton signed therefore should be cosha

Summary: 3 users judge coIEPlg.dll to be an essential file that should not be touched. For this reason, one user has already deleted coIEPlg.dll. source: file.net

How to uninstall Norton Internet Security or Norton Confidential

coIEPlg.dll  coIEPlugIn fix

To remove coIEPlugIn from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Norton Internet Security or Norton Confidential in the list of available programs.
  5. Click Uninstall.

How to tell if coIEPlg.dll (coIEPlugIn) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of coIEPlugIn. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for coIEPlugIn or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or coIEPlg.dll is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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