First Time user looking for stable firmware

HI there all well i am a new user i have not even set my box up yet but am looking on a small piece of information which is the most stable firmware update at the moment i am not going really to be using it through a network connection just mainly through a ext hard drive maybee youtube now and then also Thanks

Not a happy chappy i have been screwed powerlight is flashing but nobody is home tried reseting and such looks like gona have ring WD in the morning.

What exactly have you done.