Remove Unwanted Programs from the 'Open With' List in Vista
Open regedit and navigate to the following registry key
HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ FileExts\ .ext\ OpenWithList
Here .ext is the file extension for the file type whose 'Open With' list you wish to edit.
Now, just delete the value in this key, that represents the program to be removed, from the 'Open With' list.
Open regedit and navigate to the following registry key
HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ FileExts\ .ext\ OpenWithList
Here .ext is the file extension for the file type whose 'Open With' list you wish to edit.
Now, just delete the value in this key, that represents the program to be removed, from the 'Open With' list.
