I recently installed Kubuntu, but I did not know that it would replace the current login screen and splash screen with it's own variants. I do not know how to login with the KDE login screen. It does not give you the choice of selecting your account, but of typing in some sort of username. I'm pretty sure I typed in the correct username, but it still does not accept it. Although, it shouldn't really matter, considering the fact that I only have one account, not sure if the guest account is still enabled, but it probably is.
So, I need to know how to uninstall/delete Kubuntu without the ability to log in or just explain the login to me so I can login myself and uninstall it. I feel like the login thing just has to be an error, or I don't know what to type in. I'm pretty sure I'm putting in the correct username, or it's definitely what rests in the top right corner of my screen, but I have also been spoiled by the ability to choose and not type the login name for some time now, what a primitive system.
I thought of booting from the flash drive, looking for the kubuntu stuff in the files of my hard drive and deleting them. I tried it, but it says I am not the root user and does not give me the option of doing much of anything to those files. So, no avail.
How would I solve this problem. I have an Ubuntu 12.04 flash drive and a Windows 7 partition if that matters at all. I am also okay with hacking my compute in order to bypass the login itself and take root privileges by force, if such a solution is possible.
I feel like this is just me putting in the wrong information at the login screen, but, if it is, I just don't know the right information nor would I how to find it, so I still need a solution.