File Extension CSO

.CSO File

File extension: CSO
File type: Compressed ISO CD Image

Notes about the CSO file extension:

To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The CSO file type is primarily associated with 'CISO'. There are various compression levels (1 through 9) for this file type. You can find compression/decompression programs via a search.

Detailed information for file extension CSO:

Primary association: CISO
Identifying characters Hex: 43 49 53 4F , ASCII: CISO
Related links: PSP ISO Compressor
File Identifier - TrID
'Identifying characters' used on are
provided by Marco Pontello from his TrID database

To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

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