I don't know what reghakr has to offer, but I really think you are looking at a reinstall or restore, if you have one.
When you have your basic OS running to your satisfaction, consider using an image program, as well as the restore. There are some good free ones available (Paragon) It can save you this grief in the future when things go wrong.
I have at the moment, six images, made at different stages of Software installs, all lodged safely on another hard disk.