The HASP drivers files
The HASP driver that comes with Dirac 6 on the product CDROM is not compatible with Windows 10.
When you re-install Dirac on a new PC you need to be aware of this, and install a more recent HASP driver.
Unzip the contents of the Sentinel_LDK_Run-time_cmd_line.zip file to a convenient location on your system. Open a PowerShell window in the folder with the contents of the zip file. (If you navigate to this folder with Windows Explorer then you can open PowerShell from the Explorer's File menu.) Enter the following command: "./haspdinst -i -ld"