Errors in your registry are one of the common causes for incorrect file associations on your windows system. It is highly recommended that you check your registry for file association errors (will also check for any other registry errors).
The ECM file type is primarily associated with 'Error Code Modeler' by Neill Corlett.
ECM (Error Code Modeler) pre-processes CD image files (such as BIN, CDI, NRG, CCD, or similar) to achieve better compression ratios on programs like WinRAR.
Cannot access ECM files on windows?
When windows gives you an error message saying that it "Cannot open ECM files", this means either:
A. You need to identify a program that can open the file B. Or your registry may be damaged
RECOMMENDED:
In both cases it is strongly recommended that you run a free scan for registry errors.