So where did you install Windows 7 when you arrived at the drive selection screen in Step 7 of
Clean Install Windows 7?
Or did you even bother following the steps in that tutoria provided because you were too bothered to try to understand how to get a perfect
Clean Reinstall - Factory OEM Windows 7?
If you selected the correct partition where you wanted to install it then it doesn't matter if you formatted it or not, since the installer will do it by default anyway.
Post back a screenshot of your Disk Mgmt drive map and listings, using Snipping TOol.