can't umount my /pc filesystem

[Paul McFerrin]

Folks:

I have an unwanted filesystem (NFS) mounted as /pc that I need to get it 
unmounted ASAP.  Here is the mount output:
a: /a some_fs binary 0 0
/bin /bin some_fs binary 0 0
C: /c some_fs binary 0 0
D: /d some_fs binary 0 0
E: /e some_fs binary 0 0
/etc /etc some_fs binary 0 0
F: /f some_fs binary 0 0
G: /g some_fs binary 0 0
H: /h some_fs binary 0 0
I: /i some_fs binary 0 0
J: /j some_fs binary 0 0
K: /k some_fs binary 0 0
/lib /lib some_fs binary 0 0
M: /m some_fs binary 0 0
\\linda\c /pc some_fs binary 0 0
N: /n some_fs binary 0 0
O: /o some_fs binary 0 0
P: /p some_fs binary 0 0
Q: /q some_fs binary 0 0
/usr /usr some_fs binary 0 0
# This is default anyway:
# none /cygdrive cygdrive binary,posix=0,user 0 0

Whenever I try to umount it, I get the error message:
.$ umount /pc
umount: /pc: Operation not permitted

It HAS BEEN removed (sometimes) from the mount command but I can still 
do a 'cd' to /pc and see my wife's root drive.  How can I make this 
hard-ass /pc filesystem completely be umounted.

I wana stay on my wife's good side.  A few months ago I did some serious 
damage in which I had to do a complete backup restore to get out of 
trouble.  Is the "Operation not permitted" normal.  The /pc never goes 
away and it always comes up mounted after a reboot.

Even if the /pc is not shown by /etc/fstab, it still showup in a "find" 
operation.

- paul


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