I took over their IT Systems. It was totally in a mass and no one there knows anything about it
Heard that the previous IT Staff left without handling over. I've got to start from scratch tracing back and find out what previously was done and how the Windows Server was setup
When I booted it up it is linked to a domain where I do not have the username and password
I've prepared a USB flash drive and created a bootable image. Boot it up in WinPE environment
From there I am able to access into the File Explorer (Boot Disk Explorer) to copy out his data into an External Hard Disk as Backup in case if anything goes wrong with it
Data copying and Backup took me almost 4 hours of wait
Than I run some commands in the Command Prompt (CMD) which actually does is to reset Active Directory Domain Controller administrator account and password
Finally I am now able to login to the Windows Server
They thanks me for helping them to get back administrator account access rights