CNT File Extension - Open .CNT files

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Common File Extensions

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.CNT File Extension

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File Type

Help Contents File

Category

System Files

Common?

File Description

Help file used by Windows; contains topics relevant to a certain Help document; may be created Microsoft Help Workshop, a program for developing help documentation.

NOTE: There is a known security issue with CNT files that allows them to be exploited, causing a stack-based buffer overflow; this can be used to run malicious code; therefore, do not open unknown CNT files.

Program(s) that open cnt files

Windows

Microsoft Help Workshop