Hello, my computer has been acting really buggy lately, getting lag on games even at the lowest setting, booting with external monitor is buggy (Usually can spam the keyboard to get it to boot, but it will boot, ding, and go back to sleep, or the screen will go white and you have to open the clamshell to get it to log in. When connected to the monitor, the background is all weird, you see the original size for the laptop screen showing, and behind it is the correct size. My main problem of all of this is the Apple Hardware Test, I've lost my disk, so I've followed the instructions to internet boot it into Apple Hardware Test, but it flashes the screen a couple times and then goes into "Apple hardware test does not support this machine" with buttons to reboot and shut down. Is this because I've removed my optical drive to put another hdd in? I've also had a kernel panic yesterday, before my problems arose, I was watching a youtube video and it started looping, and my screen showed "Your computer was reboot because of a problem", when I logged in and backupd was the cause of the panic. I also haven't been able to backup my computer since the kernel panic, it keeps showing up as [computer].sparsebundle is already in use. Help? tldr; kernel panic relating to backupd, games lag when played, Apple hardware test won't start, modified my machine to have a second hdd in the optical bay. ** PAST THIS LINE IS NEW INFORMATION ** Will not boot off of my original OS X CD, hold down d (Like it says on the CD) and nothing happens. It barely spins up the CD drive, not fast enough to show it at boot. Apparently it won't let me boot over usb: Tried off my Snow Leopard applications disk, spun up as the apple symbol came up on my screen. I guess booting off my CDs will not be a solution Tried from target disk mode with another mac with built in disk drive, no success.