Since an asterisk (*) is a wildcard, when you attempt to perform a find and
replace operation to find all * and replace it with another character, excel
will find everything, not just the asterisk characters.
In order to find these special characters, you need to add a tilde (~) in
front of the special character.
For example, to find all asterisks, input this into the find box:
~*
The tilde is located above the Tab key.
If you wanted to find and replace tilde characters, then you would enter:
HTH,
Paul