Some help with dual booting

Hi, I bought an HP with Windows 8.1 installed. I put in a second hard drive, unplugged the drive with Windows 8 installed, and installed Windows 7 on that drive, then plugged back in the Windows 8 drive. I installed EasyBCD in Windows 8 and did my best to remove all the non-essential drives, and left Windows 7 & 8, with Windows 7 at the primary boot. I also disabled a few things in the...