Computer booting issues

[bigwat]

I am trying to format my friend's computer, but, each time i try to boot from the cd/dvd and it reaches a certain time it goes to a blue screen so i dont have the option to even select format e.t.c.

Now recently it s just going to a black screen telling me that a file is missing (eg system 32/config/) or something of the sort this is really tiresome i cant get to format or even select safe mode... i really want to help out .. there are two memories in his pc checked both they seem fine but this is tiresome any help!

 

[DKRON]

do you need any of the files on the HDD?

 

[bigwat]

No i really dont i just wanna get it formated and working ive check the memory and all

 

[DKRON]

the easiest way to completely wipe it via USB, either download GDISK or Killdisk,
you run gdisk by booting it onto the USB and running the command GDISK (disk 1 or 2 depending on which you want to wipe) /diskwipe