CentOS7 Reset

[DaPoops]

Hi,

Yesterday I reinstalled CentOS 7, created an admin user (IT) and updated, installed and put settings into conf files, the whole usual setup. Came back this morning and was greeted to the "Welcome to CentOS, please select your language Screen". Created another user (QWE) as (IT) was not available and noticed that programs were installed but Samba and a couple of other normal programs were not running.

What happened and can I get back into my original (IT) user?

Thanks in advance