Hey everyone, One problem after another... This time, I tried putting Windows 7 on my 1,1 Mac Pro to test out my new GTX 660's strength in games. Whelp, the installation failed - it just gave me some error before long, and had to cancel it. Upon restarting to boot back into my main partition (El Capitan), I noticed that a white cursor was flashing on my secondary screen, which means Windows. I took out the Windows 7 installation disc and tried again, but it still doesn't want to boot. Now, I either get black screens with no response or white text saying that there is no boot disk present and that I should insert a bootable device and press any key. IDK, but my Mac seems as though it still has Windows on its breath. So, I went on another Mac and mounted the Mac Pro's HDD onto that Mac through Target Disk Mode. I went and erased the Bootcamp partition in full, leaving just my Mac one. I even ran First Aid on the partition to make sure any possible errors could get fixed. Sadly, none of this has worked. My Mac is STILL bricked. It just won't boot! All my data is on the HDD, but it just doesn't want to boot off of it. As an extra safety measure, I even replaced the boot.efi files again (since these 1,1/2,1 Macs need that workaround in order to boot anything later than Lion), but that didn't help. So, I'll--later--stick in my compatible 8800GT and see what the Apple boot screen looks like (as my current card doesn't support boot screens). Currently, though, I have no idea what to do. I have to be using this machine! Any ideas? Much appreciated. -MDD P.S. Yes--I did a PRAM reset and pressed that little reset button by the fourth HDD bay. That didn't help.