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If a license key was used on more devices than allowed (single-use keys are limited to one installation), you may receive this error. Contact customer support to have the key reset.

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Occasionally, Cheetah Mobile partners with tech blogs (e.g., Giveaway of the Day, SharewareOnSale) to offer 6-month or 1-year license keys for free. These are legal and safe. Check sites like or TechSpot ’s giveaway section. If a license key was used on more

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