Hi, Preston.
There may be any of several causes. Hardware? Software? Technique?
The most common cause of apparent hangs/freezes in defrag is trying to
defrag a volume that is in use. Trying to defrag Drive C:, for example,
doesn't usually get very far before Windows updates some file on C: - which
causes defrag to start over. Soon, another file write happens and defrag
starts over again. The only sensible solution to this problem is to tell
defrag to do its job on the next reboot, before all of Windows gets loaded
and starts running - and writing to the HD.
For a better answer, tell us more about your computer and about how the
problems happen. And you probably should tackle the defrag and NAV problems
separately; they may or may not be related. Be sure to tell us which
defragger (WinXP's built-in? or Norton's?) and which version of NAV. Is
your computer a simple one-volume machine, or multi-HD, multi-partitions?
We don't need to know everything, but your description of the problem is so
vague that we really don't know where to begin guessing. :>(
RC