Windows 7 freezes at Windows Logo on Startup and then boots up complet

[Ghost Koi]

I have recently noticed that Windows 7 will freeze during startup, specifically while the Windows Logo is midway from forming. After this occurs, I will usually just have to turn my computer off and then on again. When I do this, Windows will boot up normally with no errors. If I wait, the computer will automatically continue booting up after roughly 20 seconds have passed.

Originally, I suspected this may have been a driver issue with Wacom as I received an error from one of the drivers however after removing them completely the problem persisted. I also attempted to restore Windows to a time when it was function properly using Restore Points with no effect.

I have recently flashed (updated) my BIOS and installed a 2nd Nvidia GTX 680 in SLI mode. I have also recently updated my Nvidia Drivers.

What could be causing this problem?

Edit: here is where it freezes. Sorry about the quality!

 

[Ghost Koi]

Does anybody have an idea? The problem goes away if I remove all of my peripheral devices and only two or more devices causes the problem. I tried disabling Legacy USB Support in the BIOS and that also seems to solve the problem. However, this causes my screen to go black with a blinking white cursor for several minutes.

What is wrong?!?! Yesterday this was all working fine!

 

[Ghost Koi]

Bump! Please, anyone?!?