dmocx.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026) The file was obtained from the pack Windows 7

⚠️ Important Notice: Troubleshoot dmocx.dll errors and ensure smooth software performance. Download the latest version now! 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	14.07.2009 03:05:20
File version	6.1.7600.16385
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	41.5 kb.	42496 bytes.

Hashes:

MD5: eb7b4563d6d20fc663f15fe8581d0bf2 ✅
SHA-1: fe05cc6e76d085d12772fd9f47df7973ba9014e7
SHA-256: 0324169ff09158ba7a7060a67c4e75aa9b66cd9577f11cdc21b2d900d83dd2b3
SHA-512: 3144ede24c1381d456bf920295d5872eb321bf65c11df3a6eef02fc2b737f2b865928fdce78ea2883ded7d703fd4d9db76c9022ca95e92509dcd2b9be1dbae01

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

Direct Answer

The dmocx.dll file is a legacy Microsoft ActiveX control component associated with DirectShow (specifically the DirectShow Media Object wrapper). It allows older Windows applications to interface with DirectX Media Objects (DMOs) for audio and video encoding or decoding.

Standard File Location

On a standard Windows system, you can find this file in the following directories:

32-bit Windows: C:\Windows\System32\
64-bit Windows:
- 32-bit version of the file: C:\Windows\SysWOW64\
- 64-bit version of the file: C:\Windows\System32\

How to Fix dmocx.dll Errors (Without Downloading)

You should never download individual DLL files from third-party websites, as they often contain malware or outdated code. Instead, use these native Windows methods to fix the error:

1. Re-register the DLL File

If the file exists but Windows cannot find or read it, re-registering it through the Command Prompt usually resolves the issue.

Press Windows Key + S, type cmd, right-click Command Prompt, and select Run as administrator.
For a 64-bit system, type the following command and press Enter: regsvr32 %systemroot%\SysWOW64\dmocx.dll
For a 32-bit system, type the following command and press Enter: regsvr32 %systemroot%\System32\dmocx.dll
Restart your computer.

2. Run System File Checker (SFC)

Windows has a built-in tool that automatically scans and restores missing or corrupted system files from a secure local cache.

Open Command Prompt as an administrator.
Type sfc /scannow and press Enter.
Wait for the verification to reach 100%.
Restart your PC.

3. Run the DISM Tool

If the SFC tool cannot fix the file because the local recovery image itself is corrupted, use the Deployment Image Servicing and Management tool.

Open Command Prompt as an administrator.
Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
After it completes, run the sfc /scannow command one more time.

4. Reinstall the Flagging Program

If the error only happens when you launch a specific game or app, that program's installation is likely broken. Reinstalling the application will safely place the necessary components back onto your system.

📊 Diagnostics Tool: Verify Your `dmocx.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:
MFC42u.dll
├── msvcrt.dll
├── KERNEL32.dll
├── USER32.dll
├── OLEAUT32.dll
└── OLEACC.dll
Other versions:
️ dmocx.dll 10.0.19041.3636 64-bit (x64) | ️ dmocx.dll other
Similar files:
️dmocx.dll.mui