NComputing transitioned to a subscription model years ago. Older L300 units often require an active AMP or "Legacy Device Support" license to work with the latest Windows updates. 3. How to Obtain a Legitimate License Key
It is crucial for users to understand the current status of the L300 hardware and software: ncomputing l300 license key
Add your L300 serial numbers to your account to see if they require a "Legacy Device" license. NComputing transitioned to a subscription model years ago