Restore the default open mode for. bat files

suffix name. dat files when you choose to open the way to open with Notepad, the result of the computer on the *.dat file open way into Notepad, did not modify the contents of the file, How to restore the. bat file default open mode?

Workaround:

1, click Start, in the search program and file input regedit

2, find: Computer \hkey_current_user\software\microsoft\windows\currentversion\explorer\fileexts\.dat

Will find there are openwithlist and openwithprogids two items if there are other options to remove it

3, and then the openwithlist in addition to the default of all key values are deleted

4. Delete all key values except the default and Lnkfile in the Openwithprogids.

5, Save the exit can (sometimes need to restart)