Using software without a valid license constitutes copyright infringement. While individual users are rarely prosecuted, the software may display legal warnings or disable itself if it detects a pirated key.
Here is the paper:
If you want to ensure you have a legitimate, supported version, here are the current options as of April 2026: iobit protected folder lifetime license key
Official licenses for IObit products (with the exception of MacBooster) are valid for from the date of purchase. IObit Protected Folder Windows 10 Using software without a valid license constitutes copyright