PC using windows XP with SP2 installed. My daughter loaded a small calculator programme, and changed the "file opens with" to Notepad. Now all programmes, and any Icons in Control Panel etc start Notepad. I cannot find how to change the file association back for .exe icons.
If you go to control panel folder options> view you can set what file type to associate with what prog, Or you could try right clicking on a file and select open with and choose which program to use, put a tick in the box always use this program for this type.