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Is Ledger Live stuck on “Connect and Unlock Your Device” or the “Unlock your device” screen? The first screen is before it detects your Nano over USB, and the second is after it detects the Nano but the Nano is still locked.
Getting stuck on the first one is much more common, and if you linger there long enough there’s this little “fix USB issues” utility that gets offered to you. Try running through that utility and see if it helps you get past this issue. Reply back if you have any trouble or if it doesn’t help.