
"Odyssey has been orbiting Mars since 2001. The orbiter's last reboot was in October 2003.
Although a reboot is "not a risk-free event", continuing to operate the craft without refreshing its systems would have left it vulnerable to memory flaws, NASA said last week. Incoming charged particles from space, called cosmic rays, can cause errors in Odyssey's on-board memory that accumulate with time."
I'm thinking: No way is that spacecraft running Windows.