My office building has a computer system for elevators that directs the traveler upon selecting the level to an elevator preselected with the destination floor.

My office building has a computer system for elevators that directs the traveler upon selecting the level to an elevator preselected with the destination floor. Every month or so, the system begins to slow down or lag, e.g. user enters floor, system pauses (during morning rush hour this causes delays), flashes to the selected elevator, and returns back to the user screen. The longer the interval since reboot, the longer the pause. Obviously there is some sort of memory corruption in the system causing a buffer overflow and the routine programmed in the software is not clearing it. So a manual reboot is required to make it work as normal.