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So you say that your logitech keyboard is locked. Is this a wirless keyboard?
Not many keyboards have a specific lock function. if it is wirless and its not working at all, I recommend removing the battery and replacing it. Many logitech keyboards also have a power switch. If yours does, I recommend sliding it to the on position. If its a USB keyboard, unplug it and plug it back in. If its just typing unexpectedly, then hit the shift key five times and disable sticky keys.
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