help please error 16

hi every one just found your fourm looks excellent hope some one can help me

i have read some of the pages concerning my problem but am a bit new
to xbox

I turn my xbox on and it starts to boot but comes up with error 16
from what i have been reading tells me its the software i have a bit of a problem where can i download software from and how do i find what version mine is

 

http://forums.afterdawn.com/thread_view.cfm/210562

go there they will have the answerfor you.....