Hello, I recieved a MacBook Pro 2007 from a friend that has a password, I tried resetting using single something (cmd+s), after writing the 2nd command the screen started writing weird characters and seemed glitched (will attach a photo soon), after looking around the web I noticed I could use the installation disc to remove the password, I entered the disc, hit the C key on startup but the computer just froze on the logo, same thing happened when trying to enter safe mode, I am able to reach the start screen but can't enter since I don't know the password to the user, anyone knows what can I do in such situation? Thanks a lot!