You must make sure that you save the WiX XML in UTF-8 encoding. The easiest way is to open the XML in Notepad, click File , and then click Save As . Select UTF-8 in the Encoding list. And overwrite your current XML file.
Another way is to use character codes: © for copyright and ® for registered characters.
The fact is that ordinary English letters or ASCII are valid UTF-8 characters, since they fit into 7 bits. Characters protected by copyright and registered characters are not allowed, because in UTF-8 they must be encoded as two bytes, not one.
Alexey Ivanov
source share