After I installed WIndows 7 with Boot Camp and my computer restarted itself and I pressed the Option Key (alt) and Windows 7 isn't an option. Theres only Macintosh HD and Recover HD. I kept the Windows 7 install USB in while my iMac rebooted.
This my Mac's info:
iMac
21.5-inch, Mid 2011
Processor 2.7 GHz Intel Core i5
Memory 4 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6770M 512 MB
Software Mac OS X Lion 10.7.5 (11G63)
I've also read Boot Camp's Installation & Setup Guide and tried it's solution but it didn't work. If anyone can figure out what's wrong please post your answer on here. Thanks!!