NOTE:The methods below start by elevating a run command. you can start them by just typing the command in the start menu box or ....start>run> or using the keyboard shortcut (win key + R) to start the run box.
Method 1 : Computer Management.
2 - Navigate to Computer Management > System Tools > Local Users and Groups > Users > Administrator.
5 - LogOut , and it will be there.
Method 2 : Local User Management.
1 - run lusrmgr.msc
2 - Navigate to Local Users and Groups > Users.
Local User Manager is a part of "Computer Management", that "lusrmgr.msc" is a part of "Compmgmt.msc". so the rest goes as the previous method.
Method 3 : Security Policy.
1 - Run secpol.msc .
On the right Side, you'll find on the top "Accounts:Administrator account status" Double Click that , or Right Click > Properties
Method 4 : Command Line.For this method, you need to run the command line as administrator.
For vista and windows 7, just type CMD in start menu > R.Click > Run as administrator
for windows 8 , when in metro UI, just type cmd ,it should look like that.
Right Click on cmd.exe , it should look like that.
Click on Advanced > Run as administrator
Whenever you reach the Command prompt. copy and paste the following line
net user administrator /active:yes
You should get The "Command Completed Successfully." . now you're done :D.
Log off and you'll see the administrator account in Logon Screen
So, which way is your favorite?