You don't necessarily need a premium license key to create a fast, "debloated" Windows image. Many advanced users achieve "Pro" results with the Free edition by: How to get the most out of Free version | NTLite Forums
: Sites promising free premium keys or "keygens" often host malware, such as trojans or ransomware. These tools can compromise your personal data or damage your operating system.
: Unauthorized keys found online are frequently blacklisted by the developer. If a key is recognized as illegitimate when the software "calls home," premium features may be disabled or the software may stop working entirely. NTLite Free vs. Premium Versions