- Search for and open the Windows Credential Manager
- Click on Windows credentials
- Delete any PK Protect related entries (generally there are two)
- Click Start | Run and enter %localappdata%\pkware and press enter
- Exit the PEM Agent by right clicking on the icon and choosing exit
- Go back to the PKWARE folder that you opened
- Now, delete all files in this folder but DO NOT right click as this will start the Agent
- Then start PK Protect and login as a new user.