This is a tutorial that will help you to login as a administrator in Windows 7.
In order to login as a administrator, you will first have to activate the “hidden” administrator account.
Goto “Start” and enter “cmd.exe” into the search field. (Cmd stands for Command)
Hold CTRL + Shift and hit Enter to run cmd.exe with administrator privileges.
If you need more instructions, read “How to open command prompt in Windows 7“.
Enter the following line into the command line prompt:
net user administrator /active:yes
Logoff and login as adminstrator
You will notice that there is a new account on your login screen.