Call the ASUS tech line. I just built a friends computer and used an ASUS MOBO. I would get past the load screen and would just lock up. I had to disable the JMICRON SATA. Honnestly I thought this was retarded, the tech guy could not even explain what a JMICRON was but once we disabled it things were fine.
Second, the MOBO never promted me to insert the W7 disk, my Gigabyte MOBO did. I had to reboot again with the disk in. I do like the feature of the ASUS but they need to get on the ball. Call them and ask for help, they were helpful and did speak english.