I have a friend who I tried to help out with a problem he was having with his computer. When the computer was first setup the wrong name was used to set up via Windows XP. My friend wanted me to change that name so that it was his name reflected instead of the wrong name. I went into the registry (and did not back it up) and changed all references of the bad name to my friend’s name. He installed programs using his name and now when he logs on he does not have his usual interface, his email does not work correctly and he can not copy files from his computer to an external hard drive. He can move them okay but that is all. Does anyone have any suggestions on what I should do? Thanks in advance for your assistance.
Side note: His internet connection was down last week and the techs at a couple of well known computer companies had him revert back to service pack 1 of Windows XP and now when you try to install service pack 2 it says it is already installed. But when you try to install Internet Explorer 7.0 it says you do not have the right service pack to install.