While searching for an answer to the question - How to open the C_ file? - you probably found websites, which offer software that was able to open any file extension. Do not be fooled, there is no one program that will allow you to work with any file extension, including the C_ file. Each program contains a different type of data and you need specialized software to properly work with the C_ file. Here is a list of programs that are designed to work with the C_ file - remember, these applications are able to open at most a few file extensions, they are designed to work with a specific data type.
| File type | Microsoft Winhelp Compressed |
| Developer | Microsoft Corporation |
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If after installing the program from a list, you still cannot open a file with the C_ extension, the reason may be that the file is damaged. The solution may be to find a new copy of the C_ file you want to open
In this case, the easiest way is to use the tool built into the operating system for association of the C_ file with applications to support it. Double click on the file you cannot open - the operating system will display a list of programs that are likely to work with your C_ file. Choose one of them, or select the location on a disk where you installed one of the applications from our list. Windows should then open the C_ file using the program installed earlier.
Entries containing links of the C_ file extensions with applications is located in the HKEY_CLASSES_ROOT. If you do not know how to get to the Windows Registry, or how to make changes in it, ask a specialist for help. Lack of knowledge on the subject may cause irreversible changes on your computer.
There may be a situation when a computer virus passes itself off as the C_ file. In this case, such a file will definitely not be opened. Download a good antivirus program and scan the C_ file mentioned. If the antivirus application detects malicious data, it may signify that the C_ file is infected.
| CL | IconUtils Mouse Cursor Library Format |
| CT7 | CaseMap Case Analysis Template |
| CMM | Corel Multimedia Manager Album Format |
| CACHE-2 | VLC Media Player Font Cache |
| CMP | PKWare Compression Library Archive Format |
| CV5 | Canvas 5 Drawing Format |
| CTP | CakePHP Template Format |
| CPK | DTM Test Log Format |
| CAP | PacketView Pro Packet Trace Data Format |
| CU1 | Photoline 4 Curve |
