I have installed the Logos Coptic keyboard. When writing the letters that do not exists in Greek but in Coptic I have to use the key alt-graphic. This works fine for most letters, but when I try to write the Coptic letter shai I have to use alt gra+c. It unfortunately starts a wizzard for configuration of the display and the Coptic letter does not appear. What can I do to solve the problem? Probably, alt gra+c evokes a short cut in the windows default file. One way might be to be able to pass through a key, but I do not know how to do that. Another might be to move shai to another key combination but I do not know how to do that either. Thankful for advise.