Do you have a backup Image of your system ? ? If you do restore it and the only things you will lose are anything installed or changed after the date the image was created. That is why it is important to periodically make a system backup with a program like Norton Ghost or Acronis TruImage .. There is no way to just restore the Registry unless at some recent time, you had saved a copy of the Registry to a safe location, like a thumb drive. You may be better off just doing a complete reinstall as some viruses are extremely hard to get rid of entirely.