Add file extension

File extension H1S

The most common cause of problems with opening the H1S file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the H1S file format - this type of programs are available below.

File type Microsoft Windows Assistance Platform Client Help Format
Developer Microsoft



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the H1S files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a H1S file. If it did not happen, the H1S file can be linked with the newly installed application manually. Simply right-click on the H1S file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the H1S file

  • Microsoft Assistance PlatformMicrosoft Assistance Platform
  • Microsoft Windows VistaMicrosoft Windows Vista

Why can’t I open the H1S file?

However, problems with the H1S files can also have a different background. Sometimes even the software, installed on your computer, that supports the H1S files does not solve the problem. The reason for the fact that the H1S file can’t be opened and used can also be:

- an incorrect link to the H1S file in the registry entries
- corruption of a H1S file, that you want to open
- infection of a H1S file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the H1S file from the Windows registry
- incomplete installation of the program that supports a H1S file?

Solving these problems should allow the free opening and working with the H1S files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the H1S file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the H1S files should be displayed after the file name.