Nopdb.exe
(Symantec)
Windows NT4/2000/XP service installed by Norton Speed Disk (part of Norton Utilities / Norton Systemworks). It is mainly associated with scheduling Speed Disk and is installed to start automatically by default on Windows boot-up. If you disable it, Speed Disk can still be run manually.
Recommendation :
This task can be extremely disruptive when left in its default Automatic mode. It intrudes at the most inopportune moments, thrashing the hard disk and floppy drive, and utilising upward of 80% of CPU. If you do not want such unwelcome interruptions, optimize your disk by always starting Speed Disk manually. If you go for that policy, then set NOPDB to "Manual" in "Control Panel \ Services" (NT4) or "Control Panel \ Administrative Tools \ Services" in Windows 2000/XP.