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H1S File - What is an .h1s file and how do I open it?

Learn about .H1S files and view a list of programs that open them.

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What is an H1S file? Compiled help document format introduced with Windows Vista and also supported in Windows 7; run by the Assistance Platform client ( HelpPane.exe ), which is installed by default in Windows; used by Microsoft and OEMs for producing help documents, but not used by third-party software developers.

More Information Several pre-installed H1S files can be found in the following directory: C:\​Windows\​Help\​Windows\​en-US\​ NOTE: H1S files can be compiled using the Apcompnt.exe program included with the Assistance Platform Help Compiler. They can also be decompiled using xHelpMarkup.

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Popularity4.0 | 32 Votes

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.H1S File Extension

Windows Assistance Platform Help File

DeveloperMicrosoft
Popularity
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What is an H1S file?

Compiled help document format introduced with Windows Vista and also supported in Windows 7; run by the Assistance Platform client ( HelpPane.exe ), which is installed by default in Windows; used by Microsoft and OEMs for producing help documents, but not used by third-party software developers.

More Information

Several pre-installed H1S files can be found in the following directory:

C:\​Windows\​Help\​Windows\​en-US\​

NOTE: H1S files can be compiled using the Apcompnt.exe program included with the Assistance Platform Help Compiler. They can also be decompiled using xHelpMarkup.

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Programs that open or reference H1S files

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Windows

Microsoft Assistance Platform

Included with OS

Help-Info xHelpMarkup

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Category: System Files

Updated: September 12, 2012

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What is an H1S file?↓
Compiled help document format introduced with Windows Vista and also supported in Windows 7; run by the Assistance Platform client (HelpPane.exe), which is installed by default in Windows; used by Microsoft and OEMs for producing help documents, but not used by third-party software developers.

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