What to do when it is impossible to switch of the computer

[Liloulinx]

Hi,
What must I do when I try to switch off my computer but it dosn't do it ?
After this, I have done :
Ctrl Alt F2 + shutdown -F now --> it dosn't do any thing
Ctrl Alt F3 + init 0 :  it display me this:
   INIT: Switching to runlevel : 0
   INIT: Sending processes the TERM signal
   INIT: Sending processes the kill signal
   INIT: Pid 4182 [id x]  seems to hang
and it is blocked


-- 
Liloulinx (http://freealilou/free.fr)