LMS Changed Language Over NIght

My LMS 9.0 server has been running flawless for months. We use our Boom as an alarm clock on weekdays, but not on the weekends. However, this morning the Boom woke us up at 5:45am which was strange. I tried to use iPeng to see what happened, but I couldn't as I was prompted for a username and password to access LMS (and I have never set one). Next, I went to my Windows 10 Pro box which acts as a media server for my house and was again prompted for a username and password to access the LMS Control Panel. What makes this even more fun is that the password prompt box, and now my Boom's, language is set to some Scandinavian appearing language (screenshot attached).

Has anybody else experienced anything like this and what do I need to do in order to clear the username/password prompt and set the default language back to English???



Thanks in advance for your help!
Stach

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