I tahink this problem was caused by a program downloaded to repair register after missing dll file reported. A dll file used in graphic accelleration went missing and was reported so on startup. I downloaded and ran a program from the Internet to repair this. Shortly afterward, The system started displaying a non-albhabetic character set in all text. After restart this persisted. Presumably the registry has been damaged But I do no know how to restore a backed up registry. In tahe amiddle of all this a message came up demanding that I validate Windows which as far as I remember has already been done. However, I tried to do so via the Internet but there was no connection. The phone number to call to do it that way is missing from the message.