Hide programs in the open with selection box.

This setting allows you to decide which programs are listed in Open With dialog box, which is shown when an unknown file type is opened.

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Description:
A dialog box with unknown file type is opened. The user double-clicks a file or selects open from the file's context menu to open it. In some cases, a user may open a file, whose type is not given. When this occurs, the user is prompted by an open with dialog box to enquire about the file. The user gets a short list of common file types in windows xp. Files that contain a particular type of data commonly have the same file name extension. It is appended to the file name and typically consists of a period followed by three alphanumeric characters, for example, ansi text files have .txt file name extension. For this, go to start > run menu, enter regedit and navigate to the registry path listed below. If the subkey \applications is not present, create it as explained below. Then, create a string value name noopenwith, if this value does not exist. Now, right-click and modify the value data box with yes to enable the setting and no to disable it. Click ok and close the registry editor. After logoff or system restart, changes take effect.

Level: Recommended For Experts Only

First, click the 'Start' button, and select 'Run'. In the resulting dialog box, type "regedit".

Second, go to the <b>[HKEY_CLASSES_ROOT\Applications\<User Defined Application>]</b> key(the application you want to remove from the "Open With" dialog box, in this case it is Notepad), right-click on the blank area in the right pane and click on "New > String Value" to create a new String value with the name "NoOpenWith".

Third, right-click on the 'NoOpenWith' String value and click on "Modify".

Finally, empty the value in the text box and click on 'OK'.