Okay so I have been having some issues with games freezing and just odd things. I read up on some tests to perform and one of them is memtest-86. I burned an ISO and booted from cd to run memtest. it ran, it said it passed. I hit esc to exit the screen and it goes back to memtest. I remove the disc and my bios asks me to insert a bootable disk. I disable the CD drive from boot option and it still asks me to instert bootable media. I made my HD #1 priority, did many other things to try and fix, it will not work. My computer will not boot from my HD and I can't figure out why. Thanks in advance for the help