Try System Restore......this usually does not touch your personal data however, it does go back to before the problem with the Registry happened....you have to know the date when the problem occurred and pick a Restore Point from before that time and try it.
Here is some info on how to do it, tips, etc.
Restore also works in Safe Mode....
http://bertk.mvps.org/
How about the Registry fixing software you used...does it have a feature that UNDOES the changes made?? Some can revert all the changes all at once....did you look?
Again.....you may have better access in
Safe Mode