2. Type "command.com" , and then press Enter. (A DOS window opens.)
3. Type the following:
"cd\"
"cd \windows"
Press Enter after typing each one.
4. Type copy "regedit.exe regedit.com" and then press Enter.
5. Type "start regedit.com" and then press Enter.
6. Navigate to and select the key:
HKEY_CLASSES_ROOT\exefile\shell\open\command
7. In the right pane, double-click the (Default) value.
8. Delete the current value data, and then type:
"%1" %*
Tip: Type the characters: quote-percent-one-quote-space-percent-asterisk.
9. Close Regedit utility.
Note: If you are using Windows XP and you enable "System Restore" , you need to
disable "System Restore" in "Safe Mode" before using the instructions above.
Resource: http://support.microsoft.com/kb/555067
