my dads friend gave me a computer it's a mac powerbook or ibook 4 and he is now overseas doing doctors without borders. i didn't use the computer for awhile and when i decided to install internet on it i had lost the password. the computer said that i could completely reinstall the software so i got a friend to download it, but because i restarted the computer im locked out of it and when i put in disc1 of the operating system nothing happened! what do i do i know nothing about computers and i went to this computer store geek squad and they said they couldnt do it for me because i dont have the original software! i dont know what to do! help!