Z68x-ud3h-b3 boot loop please help


Jul 15, 2011
hi just finish build my new pc and installing windows 7.
the installation was normal then it when to my desktop and 10 seconds later it said restating computer and is now stuck in a boot loop until i turn it off
any idea's whats coursing it
i have not installed any driver
i just built this pc for school
and i can get into bios
my parts
motherboard z68x-ud3h-b3 f10
cpu 2500k
qpu intel hd 3000
ram corsair 4gb installed but have one more 2gb stick
psu corsair ax1200
case corsair 650d
hdd segate 1tb
dvd LG
i norrally buy a mac made the change for school
please help
next upgrade is 6990 or ati new 7000's coming out