Well that's no fun. The "no bootable device" message means that the computer can't find any drives that have an operating system installed on them that the computer can boot up. In your case, the Windows operating system should be installed on the C partition of your computer's hard drive. For whatever reason, the computer isn't finding it there. Best course of action at this point would be to try access the factory recovery partition by continually tapping f11 immediately after turning on the computer. Then you will be guided through the steps. My concern is that if the OS partition of the hard drive became corrupted, its likely the others may have too.