1. What program should be used to open this file?
If you don't know what program to use to open the file type of the doc suffix, you can access it/fileassoc/0409/xml/?Ext=doc, of course, when using it, please change the extension after the "=" sign with the extension you want to query.
2. How to customize the associated automatic operation (Windows XP)
In Windows XP, some file types are closely related to programs, including pictures, videos, or audio files. Take picture files for example. Whenever you select these files, Windows XP will use its own picture and fax viewer to open it no matter what program you are used to using (such as ACDSee). What's wrong with this?
Open the Registry Editor and you will find some of the following items:
HKEY_CLASSES_ROOT\SystemFileAssociations\audio\ShellEx\ContextMenuHandlers\WMPAddToPlaylist
HKEY_CLASSES_ROOT\SystemFileAssociations\image\ShellEx\ContextMenuHandlers\ShellImagePreview
HKEY_CLASSES_ROOT\SystemFileAssociations\video\shellex\ContextMenuHandlers\WMPAddToPlaylist
It is projects like this that affect your habits, and the current way is to delete them all!
3. After double-clicking the executable file (.exe), it prompts that there is no associated program.
Windows 2000/XP: Double-click "My Computer" to open "Explorer", click "Tools → Folder Options", click the "File Type" tab, then click the "New" button, enter ".exe" at the file extension (excluding quotes), then click the "Advanced" button, select "Application" at the "Associated File Type", and then click "OK".
Windows 98: Click "Start → Run", enter, press Enter, and after you press Enter, a "File Manager" program will appear. Select the "Association" command under the "File" menu, and a "Association" dialog box will appear. Enter the file extension in the extension, and then select the associated program to easily implement the file association.
4. Restore Windows default file associations
Click "Start → Run" and enter:
rundll ,InstallHinfSection DefaultInstall 132 c:\windows\inf\
/i
regsvr32 /i
/i