I suspect that you have to have cyrillic already chosen in Windows as a
possible language. Click on the Control Panel, Regional Options, General and
there will be a list of languages, including Cyrillic. Select all the
languages you might be using.

Best regards,
Ray

I have an Excel shhet containing Cyrillic characters. When I save the sheet
and re-opened it, all the characters had disappeared, mainly replaced by a
?
symbol.
How can I restore the original text?