After the activated softlock license, student license, or trial version has worked for a few days, it cannot be started due to a license problem. On some computers, the message 'Virtual Machine Detected' appears.
What is the cause of it?


If a real computer with the Windows operating system is actually used and no hardware changes and/or new installation of the operating system has been made, the license problem is usually caused by the following points:

  • The mandatory service 'Sentinel LDK License Manager' may be damaged after a Windows update.
Solution: Reinstalling the driver. It can be downloaded and installed via the following link.

  • The antivirus program blocks the file hasplms.exe.
Solution: Add the hasplms.exe from the directory to the exceptions of the antivirus program

  • Other security software (e.g. Sandboxie) prevents proper communication of the license service.
Solution: You can also either add hasplms.exe to the trusted programs or uninstall this software


Hasplms.exe Sentinel LDK License Manager Softlock Trial Trial version Exception Sandboxie Virtual machine detected Error No. 30598

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