1. What program should I use to open this file?
If you do not know the doc suffix file type with what program open, you can access http://shell.windows.com/fileassoc/0409/xml/redir.asp? Ext=doc, of course, when you actually use it, replace the extension after the "=" number with the extension you want to query.
2. How to customize the associated auto Run (Windows XP)
In Windows XP, there are some file types and programs that are closely related, including pictures, videos, or audio files. Take a picture file, and every time you select these files, Windows XP doesn't matter what program you normally use (such as ACDSee), it will be open using your own picture and Fax Viewer. What is this, a mischief?
Open 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 the kind of projects that affect your habits, and the way to do that is to remove them all!
3. Double-click the executable file (. exe) to prompt for programs that are not associated
Windows 2000/XP: Double-click My Computer to open Explorer, click tools → folder Options, click the File Types tab, click the "New" button, enter ". exe" at the file extension (excluding quotes), and then click the "Advanced" button to Associated File types, select Application, and then click OK.
Windows 98: Click "Start → run", enter Winfile.exe, press ENTER will appear after a "File Manager" program, under the File menu select the "Association" command, will appear "Association" dialog box, in the extension of the file to enter the extension, and then select the associated program, It is very simple to implement the file association.
4. Restore Windows Default File associations
Click "Start → run" and enter:
Rundll setupx.dll,installhinfsection DefaultInstall 132 C:\windows\inf\shell.inf
regsvr32.exe/i Shdocvw.dll
regsvr32/i Shell32.dll
regsvr32.exe/i Shdoc401.dll