I was trying to install Mozilla Firefox on my laptop. When i try to install it shows me a mesage "install with Administrator account". I try to install with my account which is Administrator of Laptop but still it says "install with Administrator" and I stuck as i haven't use/seen any Administrator account. After that i search on google and came to know that it's hidden and not enable by default, so we have to enable this account on windowns-7 machine. Here we go :)
1. Go to Command Prompt
2. c:\> net user administrator /active:yes
The command completed successfully
3. The above line shows the successfull result.
4. Now you can use your Administrator account.
I hope this will be informative for you.