[Vi-Sion]

Hello friends i've always hated windows 8, so i'm not very used to it.
My sister laptop has a windows 8 OS,she wants me to format the laptop and replace windows 7 with windows 8.
I have many OS CDs,i first tried windows 7 CD but boot from cd failed,i then tried a windows vista CD failed aswell 3 windows XP CDs failed aswell.
Just to mention i did disable secure boot.
When i changed bootmode from uefi to csm a linux live cd that didn't work before worked fine,and one of the 3 windows XP CDs that failed before worked but when the setup is done loading files and want to start i get a BSOD
Technical information:
*** STOP: 0x0000007E (0xC0000005,0xF748E0BF,0xF8DA208,0xF78D9F08)
*** pci.sys - Address F748E0BF base at F7487000,DateStamp 3b7d855c

first question : why i'm getting this BSOD
second question: if i use my linux live CD and use GParted can i get rid of the windows 8 partition ?
i think this should be possible but again if i do this my laptop will be without any os .
i have never installed and OS on laptop that have no OS on it but it should be the same
i still can access the boot menu,boot from CD and install another OS, am i right ?

thx in advance for any possible help

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You can read more about your BSOD here.
 
There are a couple of ways that you can go about removing your W8 installation, my personal favorite is using a tool like DBAN to completely format the drive and then boot/install from the OS installation media you're trying to install.

[Gman147]

You can read more about your BSOD here.
 
There are a couple of ways that you can go about removing your W8 installation, my personal favorite is using a tool like DBAN to completely format the drive and then boot/install from the OS installation media you're trying to install.

[Ztruker]

You should also think about upgrading to Windows 10 from Windows 8. Much better operating system and easier to use. Sort of a combination of Windows 7 and 8.

 

See here: Windows 10 - Clean Install

 

Add Classic Shell to give you a Start Menu you are familiar with (or your sister) and I think you will both be happy with it.

[Vi-Sion]

Well thanks mates it looks like i had problems with my CDS the CDS work but the boot not working.
I managed to get myself a new windows 7 CD and the boot worked .

You should also think about upgrading to Windows 10 from Windows 8. Much better operating system and easier to use. Sort of a combination of Windows 7 and 8.
 
See here: Windows 10 - Clean Install
 
Add Classic Shell to give you a Start Menu you are familiar with (or your sister) and I think you will both be happy with it.

I stopped using windows a year ago i prefer linux now, when i used to use windows my favorite was windows 7 that's why i did use it on my sister laptop.
About windows 10 well i didn't try it but i did hear lots of stories about it and it wasn't encouraging.

[Gman147]

I can understand that, back when I used the insider preview for W10, it was so buggy it actually became unbootable. It's much more stable now and I haven't had a single problem.