If you have working L300 hardware but no license, or if your license activation fails, consider these legitimate alternatives:
Newer NComputing products (RX series) use different licensing. Do not buy a “RX420 license” expecting it to work on an L300—it will not. ncomputing l300 license key
Contact NComputing or a reseller like ThinClientShop.com. They may still offer vSpace Pro subscription licenses that support legacy L300 units, but support is limited. If you have working L300 hardware but no