I tried to move local Q2A site in my XP + IE8 machine. It seems to be displayed without problem in particular. It was displayed definitely with Standard CK and CK4. Because I rarely use IE, my IE settings will be default. I remember that IE was updated for security in the other day.
Many problems of CK are Javascript errors. In the state that is not displayed, is error displayed at bottom-left of browser? Otherwise, you may be able to investigate with developer tool (F12). For other causes, I am worried about the setting of "Compatible mode" of IE.