Little help here?

[ciroccoj]

Here's my crossword entry for 104 Across:

C

O

M

P

U

T

E

R

.

.

C

K

U

P

And here's the clue:
104. Reason to reboot.

Help me out, here, because I'm sure the answer is not the obvious one that's coming to my mind. Not for the LA Times Sunday Crossword.