I have windows XP home and went to remove some unwanted programs that I do not prefer to use them any more. When I went to add and remove programs I realized that the buttons to remove or repair the programs are been missing. I have also checked regedit/hkey_local_machine (software, Microsoft, windows, current version, uninstall and most of my programs which are not there and do anybody have any idea about what has happened or what I need to do?