Windows 8 Not Booting

[brandontechtips2]

Hi,

I just installed Windows 8 on my primary drive and started it up, everything was working, but there was a missing icon in the notifications bar. Then, the computer started getting laggy, and the Start screen showed nothing. Then, the computer restarted on it's own. Fast forward a few days (and flawless reboots) later, I had to restart the computer. This usually takes 10 seconds, but the computer screen went black after the Windows loading screen, when, 20 seconds later, it turned grey (my default Windows colour). It won't boot now.

I should let you know that I have three drives, one for a main OS, a second for secondary OSes, and a third for storage. The problem was on the primary one (and also applies to the secondary one), and I am currently running on the third drive, which has Windows on it as well. The secondary drive has Windows 10 Technical Preview on it, and for some reason, the first two OSes were acting as if they were dual-booting (the OS selection menu at boot).