Official Acer driver updates do require a license key. Genuine Acer drivers are provided for free by the manufacturer to ensure your device functions correctly. Acer Community

: Most essential drivers are automatically verified and delivered through standard Windows updates. Windows Update Advanced options Optional updates to find specific hardware drivers. Acer Care Center

If a "driver update utility" is asking you for a license key or payment, it is likely a third-party application, which some users consider bloatware or "scareware". You should avoid using unauthorized third-party keys, as they can lead to security risks or system instability. Acer Community Safe and Free Ways to Update Acer Drivers