mcnttype.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Fix MCNTTYPE.DLL Errors and Ensure Smooth Program Operation Quickly and Easily. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
Creation date	08.10.2025 22:43:44
File version	4.1.9816.500
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	38 kb.	38912 bytes.

Hashes:

MD5: 62125764083c6a7772654dc9c7ce8daf ✅
SHA-1: b9c93950a02c037fa0bc67c1173fd7dbdf1c30ae
SHA-256: ef6e1d615b59a600f0ed33cb36b75d73312ee8d00dcae01a7f31e119a9d2d163
SHA-512: 28933b02af06dedb31ecd36fb831a35a4439af402c02bc84304848bf515360a5fbca38717112fe67dbddd6bd5e700aeb2b7f00d7d4cfd0bc5f2318203d3f5d68

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

To fix the mcnttype.dll (commonly associated with MathType or related office applications) error without downloading external files, you can repair it using built-in Windows utilities, local application recovery, or file restoration tools.

??? 1. Check the Recycle Bin

Sometimes DLL files are deleted accidentally.

Open your Recycle Bin from the desktop.
Search for mcnttype.dll or MathType related files.
Right-click the file if found and select Restore.

?? 2. Run System File Checker (SFC)

Windows has an internal tool to scan and replace missing or corrupted system files automatically.

Press the Windows Key, type cmd, and select Run as administrator.
Type sfc /scannow and press Enter.
Wait for the verification to reach 100% and reboot your PC.

??? 3. Deploy the DISM Tool

If SFC cannot fix it, the Deployment Image Servicing and Management tool repairs the system image.

Open Command Prompt as an administrator again.
Execute this command: DISM /Online /Cleanup-Image /RestoreHealth.
Restart your device once the process completes.

?? 4. Repair the Parent Application

If the error occurs when launching a specific program (like Microsoft Word or MathType), use the built-in repair wizard.

Open the Control Panel and click on Uninstall a program.
Find MathType, Microsoft Office, or the software causing the error.
Click Change or Repair at the top of the list.
Follow the on-screen prompts to run a local repair.

?? 5. Re-register the DLL File

If the file exists but Windows fails to read it, you can re-register it via the command line.

Launch Command Prompt as an administrator.
Type regsvr32 /u mcnttype.dll and press Enter to unregister it.
Type regsvr32 mcnttype.dll and press Enter to re-register it.

If you would like to pinpoint the exact issue, let me know:

What specific application triggers this error?
Does the error say the file is missing, corrupted, or unable to load?

📊 Diagnostics Tool: Verify Your `mcnttype.dll` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Connected files:
sal3.dll
├── cppu3.dll
├── cppuhelper3MSC.dll
├── MSVCR90.dll
├── MSVCP90.dll
├── KERNEL32.dll
└── mcnttype.dll