mscomm32.ocx - Analyze and How to Fix Errors

⚠️ Important Notice: ocx for serial port communication in Windows applications. Essential for COM port control. 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	25.11.2013 05:36:21
File version	6.1.98.39
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	✅ Have signed	File have signature, it is original file.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	117.1 kb.	119960 bytes.

Hashes:

MD5: d60fd0c924c0172b5ad2967e8473ffcd ✅
SHA-1: 33155d3387c5e89248140ddf11034bcad3beb2a5
SHA-256: ad88ac04cfc191f7b8de8db9ab1cebc42c9e75879aadc23d03db76d4090713cb
SHA-512: 2403d436f59f2d2a13b9948f573645dec547fcb6fb0513e001fbbb59843ef5257e03aa0e1a6e889aecea7580772bdf6f7a9cbdbd8909ebef75f5d7eb08f4ef4f

Digital file signature mscomm32.ocx ✅

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

What is MSCOMM32.OCX?

MSCOMM32.OCX is an ActiveX control developed by Microsoft for serial port communications. It allows legacy software applications to connect to, send data through, and receive data from external serial devices via computer COM ports.

Standard File Location

On modern 64-bit and legacy 32-bit Windows systems, the file belongs in specific system folders:

• 64-bit Windows: C:\Windows\SysWOW64\
• 32-bit Windows: C:\Windows\System32\

How to Fix MSCOMM32.OCX Errors Without Downloading

Errors usually happen because the file is present on your system but not properly registered in the Windows Registry, or because it was moved. You can fix this using built-in Windows tools.

Step 1: Locate the File on Your PC

1. Open File Explorer (Win + E).
2. Search your hard drive for mscomm32.ocx to see if it already exists in another folder (like an old application folder).
3. If you find it elsewhere, copy it.
4. Paste it into the correct standard location listed above based on your Windows version.

Step 2: Register the File via Command Prompt

1. Press the Windows Key.

2. Type cmd.

3. Right-click Command Prompt and select Run as administrator.

4. Type one of the following commands based on your system architecture and press Enter:

   • For 64-bit Windows:

     regsvr32 %systemroot%\SysWOW64\mscomm32.ocx

   • For 32-bit Windows:

     regsvr32 %systemroot%\System32\mscomm32.ocx

5. A dialog box should appear saying "DllRegisterServer in... succeeded."

Step 3: Run the Program in Compatibility Mode

If registration succeeds but the app still fails, the legacy app itself might be the issue.

1. Right-click the shortcut or .exe file of the software causing the error.
2. Select Properties.
3. Go to the Compatibility tab.
4. Check Run this program in compatibility mode for and select Windows XP (Service Pack 3) or Windows 7.
5. Check Run this program as an administrator.
6. Click Apply and OK.

---

📊 Diagnostics Tool: Verify Your mscomm32.ocx 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:
KERNEL32.dll
├── USER32.dll
├── ole32.dll
├── ADVAPI32.dll
├── OLEAUT32.dll
└── GDI32.dll

Microsoft Corporation