Hi all,

I dual-booted windows 8 release preview with my windows 7. When I signed in, it led me to a boot screen. I decided to change it and made it so that Windows 7 would be the default OS. When I did, the boot screen changed to a black prompt. It said to use the arrow keys, but when I pressed them, nothing happened. I tried F8, not work. Now I can't access the windows!

What can I do? Thanks.

How did you change the boot loader? What app did you use?