For those (edit: using DT 4.06 and still) getting the 'emulation detected' message without a 4/5 digit SecuROM error code:
- remove/disable any virtual drive
- open HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices and delete all values (they'll be automatically regenerated after reboot)
- uninstall
SPTD
- Reboot
- (re)install SPTD
- Reboot
- create virtual drive in recommended DT version 4.06 and try again
! If you've changed any drive letters in Windows drive management deleting those reg values will undo those changes. In this case you may have to correct some Start menu entries and desktop links.