HELP! New build, blue screen @ windows 7 is starting

burbee

Honorable
Dec 14, 2012
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10,710
So I built a fairly new pc with a new CPU, MOBO, RAM, PSU.

intel i5 3570k
Gigabyte GA-Z77X-D3H
Corsair Vengeance 1600Mhz LP 8GB
Corsair TX650M
ASUS GTX660 Top

I am on my windows 8 now, but when I try to start windows 7 some weird error appears.

At windows loading screen, it freezes, I get a blue screen and it says somethin like:

STOP 0x00007B

I did not change the HDD. I plugged the hdd in the black SATA connectors. Also the CD/DVD drive.

I can boot into Windows 8, which is a different partition BUT same HDD..

All hlp appreciated, I buil this pc with everyone's suggestions here

*** Task manager says my cpu is now at 1.75GHz-2GHz? Dos it auto underclock?