Have you already tried to manually add a virtual SCSI/IDE drive in DT Pro ?
Where exactly do you deduce from SPTD hasn't been installed ?
According to your arn file at least SPTD.sys is present (which of course doesn't automatically mean it's working properly).
Also, please check with the standalone SPTD installer from Duplex Secure whether it finds an older SPTD installation:
DuplexSecure - Downloads
If your problem persists please temporarily disable all non-Microsoft services for test purposes:
Open System Configuration Tool (msconfig.exe), go to Services tab, tick "Hide all Microsoft services"
and finally "Disable all" remaining services, reboot and check SPTD functionality.
There also seems to be a remain of a Panda Security Product (pavboot.sys).
Was this product uninstalled long ago, or maybe only after DT Pro has been installed ?
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