If its a dedicated server then you usually have to send in a reinstall ticket...

Contact your support and request a OS reinstall... They might charge you unless is free
Loonycgb2 Reviewed by Loonycgb2 on . how to reinstall server? topic says it all, I have linux dedicated server and centos installed on it, there was a virtualmin panel, I tried uninstalling it and installed kloxo again, but that didn't worked, I've sent a support ticket to my server provide, he replied this---> "You can't install One panel if the another panel is present . You can't remove the panel , there is no Uninstall type thing in it . For new panels you have to reinstall server and then Install panel. " so, how do I reinstall server? Rating: 5