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LWE10198 : Howto get the personal favorite program back in charge (Windows XP vs. Vista)?

Symptom:

File extensions have been altered to another application after installation

Cause:

Installation routines often make their application to default program for associated file extensions

Solution:

Probably everybody knows this:

you douple click a shareware picture viewer or mpeg-player and afterwards this application always starts upon doubleclick, not the personal favorite-application...

This is caused by alteration of the extension definition in Windows registry (HKey_Classes_Root). There are basically two ways to get your standard back (without messing in the registry):

- define the default application for a certain extension (works fine, if only one or few exensions are involved)
- use repair or installation routines of favorite application.

however, this has been made a lot better in Vista. Under Control Panel, you find "Default Programs" (or the appropriate translation, in german it`s "Standardprogramme"). This let's you define every application per extension (as known from former Windows versions via Windows Explorer, Extras, Folderoptions -> Filetypes) or define an application according to it`s settings (like for example every extension used by internet browsers). 


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