format prob

Right click on the file and select open with, then select the program that you wish to associate with them, it will have a tick box asking if you wish to make this permanent.
 
OK, see if you can disassociate it with anything, mine says unknown association.
 
Sorry, forget that, I think the route may be, Control panel, Folder options, File Types and see what it is associated with, you should be able to delete the association, I don't believe that the file needs to be associated with anything, it is not in my list.
 
hi rolfw i have deleted soft dvd then i could get to the box open with unticked remember rebooted and dat files are back thanks for your help

psats
 
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