Fix your computer - the US government says so!
Interesting little titbit - personal computers are now important enough to warrant a warning by the good ol' department of homeland security in the US.
Funny they should be taking an interest with this particular patch - as far as I was aware this is fixing general security issues, not any amazingly huge holes. Telling people to patch their computers on the same day they are preparing to ground planes and introduce stupidly stringent baggage restrictions is unusual.
Surely they have better things to look at...?