error black screen asking to turn the note

I am trying to install snow leopard on my notebook and I'm not getting hpg42, recorded the cd boot, but when I put the cd in one snow leopard black screen appears telling me to turn off the laptop, since I typed -x commands that sought in internet but so far nothing worked. Please could anyone help me because I bought the original Apple system and would very much even install it on my not.

nspovinelli said:

I am trying to install snow leopard on my notebook....

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