Error message upon launching Daemon Tools Lite 4.3

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Daemon Tools used in Windows-based systems is a useful software to edit optical disc as well as to emulate or imitate disk image. The user may face error issues with the launch of Daemon Tools Lite 4.3. The problem can happen despite having the required utilities such as WinXP pro sp2, kernel debugger etc. and the reinstallation of Daemon Tools will not solve the problem. This is a bug issue and it happens if the system has an old version of Daemon Tools before the upgraded version of Windows 7 has been installed. This old version has to be uninstalled via the registry. After reboot, the new Daemon Tools version has to be installed again.


Upon launching Daemon Tools Lite 4.3, I get the message:

"This program requires at least win2000 with SPTD 1.51 or higher.
The kernel debugger must be deactivated."
  • I have WinXP pro sp2, SPTD 1.6 and the kernel debugger
  • I reinstalled Daemon, I even deleted it from the registry; the install went smoothly, but that's all.
  • I do not know if it's related, but I recently moved to AVG Free Antivir and Ad aware.


This bug occurs if you have an older version of Daemon Tools installed prior to an upgrade to Windows 7:
  • Uninstall your current DT (restart later on request)
  • Run regedit and go to:

  • and delete the "MSR" folder entirely
  • Reboot
  • Download the latest version of DT and install it.

Thanks to charl.attend for this tip!
Jean-François Pillou

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