New
#11
Did you burn the ISO to a DVD and can you at least boot from that burned DVD?
Hard to help you since your system specs are not filled out and we know nothing about your hardware except "HP Pavilion".
How large is your hard drive?
If you can boot from that DVD you may have burned, you can easily change from GPT to MBR, but you would have to delete all partitions to do that. Is there anything on the hard drive that you want to keep--personal data of any type?