The error in the event viewer when this abnormal termination occurs is as follows (on Vista Ultimate x64 SP1):
Faulting application sdactivate.exe, version 1.0.4.6, time stamp 0x479f5025, faulting module sdactivate.exe, version 1.0.4.6, time stamp 0x479f5025, exception code 0xc000000d, fault offset 0x00057c37, process id 0x9c, application start time 0x01c9047e991ff937.