Environment
Security Manager 6.0
Security Manager 6.5
MS DTC
Situation
Resolution
1. Use Add Windows Components, and remove Network DTC.
2. Go to the command line and run: MSDTC -uninstall
3. Go to the registry and delete the MSDTC keys in HKLM/Software/Microsoft/MSDTC, HKLM/System/CurrentControlSet/Services/MSDTC, and HKEY_CLASSES_ROOT\CID (if they're still there).
4. Reboot
5. Go to the command line and run: MSDTC -install
6. Use Add Windows Components, and add Network DTC.
7. Go to the command line and run: net start msdtc
Cause
Additional Information
http://support.microsoft.com/kb/306843
Also, Microsoft does NOT support machines that are disk duplicated:
Microsoft Policy Statement
Microsoft does not provide support for computers that have been installed by duplicating fully installed copies of Windows. Microsoft supports computers that were installed by using disk-duplicating software and the System Preparation Tool (Sysprep.exe).
http://support.microsoft.com/kb/162001/