To start a program as an administrator
In Windows Explorer, click the program executable file that you want to open.
Press and hold SHIFT, right-click the program icon, and then click Run as.
Click The following user.
In User name and Password, type the Administrator account name and password that you want to use.
Notes
Use this procedure if you want to perform administrative tasks when you are logged on as a member of another group, such as Users or Power Users.
If you want to run a program as a domain administrator, in User name, type the name of the domain followed by the administrator account name. For example:
DomainName\AdministratorName
The use of Run as is not limited to Administrator accounts.
If you try to start a program, such as an MMC console or Control Panel item, from a network location using Run as, it could fail if the credentials used to connect to the network share are different from the credentials used to start the program. The credentials used to run the program might not be able to gain access to the same network share.
If Run as fails, the Secondary Logon service may not be running. For more information, click Related Topics.
You can also use Run as from the command prompt. For more information, click Related Topics.
The Secondary Logon service accepts only password authentication. If policies require smart card logon, Run as will not work.
How do I find my user name and password to get into Admin account?