I live in Germany but have my Windows 7 system set to the English (UK) format (except for location, which is set to Germany). The Windows itself is an English one. I have only an American English and a Russian keyboard layouts installed. In the last weeks I noticed that a German layout appears now and then, and behaves really weirdly: I can switch to it, but it's not in the list of installed layouts.
I can remove it by first adding it to and the deleting it from the installed layouts. But I'd like it to stop appearing on its own. I couldn't spot when it appears yet. This problem is not seen too often. I've found two more threads on it, without a clear solution: http://www.sevenforums.com/general-discussion/99464-english-keyboard-layout-appears-its-own.html and Problem removing US keyboard layout from input languages.
Also I've checked that the language for non-Unicode programs is German. I wonder if it can cause problems. To be honest, I don't remember setting it but may be I did. Anyway, I am not using any old programs.
Any comments or suggestions?