Can't boot 8-BETA2 on HP Pavilion dv7

Hi all, I'm trying to boot from 8-BETA2 DVD in order to install it on an HP Pavilion DV7-1199EF Laptop, but I get this error message: run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config This is repeated a few times then installation stops and debugging console opens, see

Can't boot 8-BETA2 on HP Pavilion dv7

Hi all, I'm trying to boot from 8-BETA2 DVD in order to install it on an HP Pavilion DV7-1199EF Laptop, but I get this error message: run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config This is repeated a few times then installation stops and debugging console opens, see