I have been trying to install a music sharing application on my friends computer but I keep getting a message that I cant do this because I am not the administrator. I asked my friend who the administrator was he did not know. I went into safe mode and saw that his family and him were classed as limited users. He could not remember who installed his os or if their was a password. so I made him an administrator and tried to change the admistrator account from his administer account. Could'ent do it nothing to click on to change it, but if I tried to change the limited accounts I could do it by clicking on change the account type. I never got this option when trying to change the account named administrator. Is it possible to change this without doing a clean install. Thanks.