i was trying to open an iif file in excel by right clicking the file, clicking "open with..." and clicking "choose default program." excel wasn't in the list, so i clicked, "browse..." and navigated to excel in my program files folder. when i clicked "ok," excel was not added to the list and i could not choose to open the file with excel. of course i could've opened the file in excel by opening excel and clicking file/open, but there is an actual solution. this is what worked for me:
solution
warning! these directions instruct you to modify your computer's registry. if you mess up these directions, you can seriously mess up your computer. if you don't know what you're doing, just use the workaround i mentioned above.
- click start and then click run.
- type "regedit" and then click ok.
- navigate to the key "HKEY_CURRENT_USER\Software\Classes\Applications\"
- right click the key and click delete.
