I've been successfully running Windows 7 Ultimate on a spare work computer with 3 physical hard drives - a primary SSD drive (C:) and 2 other "data only" drives - for over a year. Last summer I installed the Windows 8 Consumer Preview on one of the secondary drives - the install worked perfectly and dual boot started working immediately with no issues. Now that Windows 8 has been released, I booted into WIndows 7, deleted the dual boot entry for Windows 8 Consumer Preview using MSCONFIG (boot tab), and formatted the drive that contained the Consumer Preview OS. Downloaded Windows 8 Professional (English) X64 from Microsoft TechNet, started the install, pointed it to my old Windows 8 only hard drive (formatted now) - and the install worked perfectly. But when I went to reboot, dual boot didn't come up - I booted straight into Windows 7. Subsequent re-installs worked great, but the dual boot entry never shows up and the computer always boots into Windows 7.
I'm scared to start screwing with my boot file, although I've read about some good tools like EasyBCD that help. Not exactly sure what my problem is - my preference is for the Windows 8 installation to take care of all boot issues automatically, like it did with the Windows 8 Consumer Preview. Any ideas?