How to Fix Runtime Error 339: MSCOMM32.ocx

Download and copy the DLL file to Windows
1. Download the "MSCOMM32 zip file" (see Resources) and extract by right-clicking on the file and click "Extract All" from the drop-down menu.
2. Click "Start" and then type "windows/system32/" in the search box. Double-click the "System 32" folder to open the folders location.
3. Open the extracted folder and drag and drop the "MSCOMM32.OCX" file over to the System 32 folder. Alternatively right-click the "MSCOMM32.OCX" and click "Copy" and then right-click anywhere in the System 32 folder and select "Paste" to make a copy of the DLL.
Registering the DLL file
4. Click "Start" and type "Run" in the search box. Click the "Run" shortcut application. The Run box displays on the screen.
5. Type "cmd" to open the Command Prompt window. Type "regsvr32.MSCOMM32.OCX" in the command prompt utility to register the DLL file.
6. Type "Exit" in the Command Prompt to close the application. Close the Run box.