Please try the following to resolve error E02023:
- Fully shut down the NCSOFT Update Helper by going to your system try and right clicking the NC icon and choosing exit.
- Go the the following link and download and run the new program that you receive.
If your issue still persists after trying all the suggested steps please submit a Technical Support Request. We recommend you run a DXDIAG first and attach the results to your support help request. For help with how to do this, please reference the KB Article here.