My past experience says it's a malware attack. You should format the "thing" that you plug in. If you must keep the files then you better get an antivirus software. SafeBytes is well known as an anti malware. It's Microsoft certified so, I think you can trust it.
Running win 10, all of a sudden the things that I plug in, like an mp3 player, don't show in English. It is stuff like this...Φ@*gM(ñLI. .. How do I get it back to English Letters ?

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