Administrator privilege for installing software
Depending on the operating system, you may need to be logged on as the administrator to install software.
To change a user’s account:
1Click the Windows Start Button 
on the taskbar.
2Click Control Panel, User Accounts and Family Safety, and then click User Accounts.
3Click Manage another account, and then click the account you want to change.
4Click Change the account type, select the account type you want, and then click Change Account Type.