Ouverture de page et ou fichier??

Bonjour,voila mon problème est le suivant:quand j'essaye d'ouvrir un fichier je tombe régulièrement sur la page ci dessous.Que dois je faire quand sa arrive????

Windows has the following information about this file type. This page will help you find software needed to open your file.

File Type: Unknown
Description: Windows does not recognize this file type.

You may search the following Web site for related software and information:

* Windows Live Search

You may purchase or download software related to this file type from the following Web site:

* Windows Marketplace

Have questions? See these Frequently Asked Questions.

Copyright © 2008 Microsoft Corporation. All rights reserved. Terms of Use | Disability/accessibility | Privacy Statement