Dat Tieu:
nopdb.exe is associated with Norton Speed Disk.
http://www.liutilities.com/products/wintaskspro/processlibrary/nopdb/
Can't find any info on the others. Have you scanned for viruses? Do these
files run automatically when Windows starts? If so, you may be able to
identify them by running msconfig and checking the list of startup items. To
do this, click Start>Run, type "msconfig" (no quotes), click OK. In the
System Configuration Utility window, click the Startup tab. Go through the
list to see if any of these files are listed. This may give you a clue as to
which program (if any) these files are associated with. Are these files
located in program folders? The location of these files may give a clue as
to their purpose. For example, I would expect to find the nopdb.exe file in
the Norton Speed Disk program folder. Have a look at these things and post
back with the results.