Notes about the 3MM file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The 3MM file type is primarily associated with '3D Movie Maker' by Microsoft Corporation.
Detailed information for file extension 3MM:
Hex: 43 48 4E 32 20 43 4F 53 , ASCII: CHN2 COS
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
To view technical data on file-extension 3MM click this link
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System Info for File Extension .3MM
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
ProgramID: 3D Movie Maker
EXEFile: %ProgramFiles%\Microsoft Kids\3D Movie Maker\3DMOVIE.EXE %1