Please sort all of your files in to the standard User folders: Documents, Pictures, Music, Downloads, Favorites (these are populated by Internet Explorer Favorites), Desktop.
Once you do that, drag each of those folders from C:Windows 7/Users/Melissa to the external.
Now open the original folder on C on the left and the backed up copy from external on right and compare that all of the files are copied for each User folder.
Once you've done that you're ready to go with the Clean Reinstall.
If you'd like for me to help I might have some time while I am at the MS MVP Global Summit 2013 in Seattle starting Sunday through Thursday but it would be better to wait for my return. I am still willing to connect via TeamViewer to set up a perfect install after you do the initial install and get online.