How to Fix Xpcom_core.Dll Not Found or Missing Errors

A Troubleshooting Guide for Xpcom_core.Dll Errors

Xpcom_core.dll Error Messages

There are several different ways that xpcom_core.dll errors can show up on your computer. Here are some of the more common ways that you might see xpcom_core.dll errors:

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

Xpcom_core.dll error messages might appear while using or installing certain programs, ​when Windows starts or shuts down, or maybe even during a Windows installation.

The context of the xpcom_core.dll error is an important piece of information that will be helpful while solving the problem.

Cause of Xpcom_core.dll Errors

Xpcom_core.dll errors are caused by situations that lead to the removal or corruption of the xpcom_core DLL file.

In some cases, xpcom_core.dll errors could indicate a registry problem, a virus or malware issue or even a hardware failure.

Don't Want to Fix This Yourself?

If you're interested in fixing this problem yourself, continue with the troubleshooting in the next section.

Otherwise, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more.

How to Fix Xpcom_core.dll Errors

Do not download xpcom_core.dll from a DLL download website. There are many reasons why downloading a DLL file is a bad idea. If you need a copy of xpcom_core.dll, it's best to obtain it from its original, legitimate source.

Start Windows in Safe Mode to complete any of the following steps if you're unable to access Windows normally due to the xpcom_core.dll error.

Recovering a deleted copy of xpcom_core.dll with a file recovery program is a smart idea only if you're confident you've deleted the file yourself and that it was working properly before you did that.

Try your best to complete this step. Reinstalling the program that provides the xpcom_core.dll file, if possible, is a likely solution to this DLL error.

The xpcom_core.dll file may or may not be related to video cards - this was just an example. The key here is to pay very close attention to the context of the error and troubleshoot accordingly.

  • Use a free registry cleaner to repair xpcom_core.dll related issues in the registry. A free registry cleaner program may be able to help by removing invalid xpcom_core.dll registry entries that might be causing the DLL error.

We rarely recommend the use of registry cleaners. We've included the option here as a "last resort" attempt before the destructive step coming up next.

  • Perform a clean installation of Windows. A clean install of Windows will erase everything from the hard drive and install a fresh copy of Windows. If none of the steps above correct the xpcom_core.dll error, this should be your next course of action.

All the information on your hard drive will be erased during a clean install. Make sure you've made the best attempt possible to fix the xpcom_core.dll error using a troubleshooting step prior to this one.

Applies To

The xpcom_core.dll error message could apply to any program or system that might utilize the file on any of Microsoft's operating systems including Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000.