How to Fix the CNMSSC DLL Error on Windows?

If you’re getting the CNMSSC.DLL is missing error on your Windows computer, don’t worry. You can easily fix it by following the instructions in this blog post.

How to Fix the CNMSSC DLL Error on Windows?

What is the CNMSSC DLL Error?

The CNMSSC DLL error is a Windows-specific error that typically occurs when a user trying to run a program that is not compatible with their operating system. This error can also occur if the user does not have the required permissions to run the program.

Causes of the CNMSSC DLL Error

There are several reasons that may cause the CNMSSC DLL error. One of the most common reasons is due to a conflict with another program. When two programs are trying to access the same file or resource, it can often cause errors. Another common reason for this error is due to a problem with the Windows Registry. The registry is a database that stores all the important settings and options for your computer. If there are any corrupt or damaged entries in the registry, it can often cause the CNMSSC DLL error. Finally, this error can also be caused by a virus or malware infection. If your computer is infected, it can often damage or corrupt important files, which can lead to the CNMSSC DLL error.

How to Fix the CNMSSC DLL Error

CNMSSC.DLL is a critical system file that is required for Windows to function properly. If this file is corrupt or missing, you will encounter serious errors and your computer will be unstable. The best way to fix this problem is to replace the corrupt or missing file with a working copy. Here’s how:

1. Download a new copy of the CNMSSC.DLL file from a trusted website.

2. Copy the file to the C:\Windows\System32 folder.

3. If you’re using a 64-bit version of Windows, copy the file to the C:\Windows\SysWOW64 folder as well.

4. Reboot your computer and the problem should be fixed.

Fixing the Registry

The Windows Registry is a critical component of the Windows operating system. It stores information about all the hardware and software on your computer, as well as your user settings. If something goes wrong with the registry, it can cause serious problems with your computer.

One way to fix the CNMSSC.DLL error is to edit the registry. This is a complex process, and it is recommended that you back up your registry before making any changes. To edit the registry, you will need to use a registry editor. Windows comes with a registry editor, but it is not recommended for use by beginners. There are many free registry editors available online.

Once you have opened the registry editor, you need to find the key that is causing the error. The key will be different for each computer, but it will be similar to the following:


Once you have found the key, you need to delete it. To do this, right-click on the key and select “Delete.” Once the key has been deleted, restart your computer. The CNMSSC.DLL error should now be fixed.

Re-installing the Program

If you are seeing the CNMSSC.DLL error on your Windows computer, it is likely that there is an issue with the program that is using this file. One way to fix the problem is to re-install the program. This will replace the CNMSSC.DLL file that is causing the error.

To do this, first, uninstall the program that is causing the error. You can do this by going to the Control Panel and selecting “Add or Remove Programs.” Find the program in the list and click “Uninstall.”

Next, restart your computer. Once your computer has restarted, re-install the program. You can do this by insert the program’s installation disc into your computer’s CD-ROM drive and following the prompts.

After the program has been installed, restart your computer again. This should fix the CNMSSC.DLL error.

Updating Windows

If you’re seeing the CNMSSC.DLL error on your Windows computer, it’s likely that the operating system is out of date. One way to fix this issue is to update your copy of Windows. To do this, open the Start menu and then click on “Control Panel.” In the Control Panel, click on “System and Security” and then select “Windows Update.” Click on the “Check for updates” button and then install any available updates.


The cnmssc.dll error is a common problem for Windows users. This error can be caused by a variety of factors, but the most common cause is a corrupted or damaged DLL file. The best way to fix this error is to use a registry cleaner to scan and repair any registry errors that may be causing the cnmssc.dll error. Additionally, you can use a DLL fixer tool to replace the damaged or missing DLL file.

How to Fix the CNMSSC DLL Error on Windows?

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