This was to avoid the bug in NT where the servers, if they hadn't crashed already, would crash for sure at the 49.7 day mark.
This bug took down air traffic control computers: http://news.techworld.com/operating-systems/2275/microsoft-s...
This bug took down air traffic control computers: http://news.techworld.com/operating-systems/2275/microsoft-s...
That's not so bad. So long as they have the option to skip this week's reboot, this shouldn't be a problem in combat. (They should've randomized the reboot schedule so that an enemy couldn't exploit it.)
It seems you could get close to ensuring such a time would exist by creating constant emergencies for the crew to deal with such that rebooting would be hazardous, and waiting for the reboot-or-crash date to launch the major attack.