Make Windows 7 without an administrator

During the Windows 7 installation create a useraccount, let say USER1. This user is an "administrator" by default now.
You will call your computer PC-NAME
After installation keep the pc in a workgroup (so do not add the computer to a domain)
Now log on to your computer as: PC-NAME\USER1
Now create a new account: USER2 and do not add a password to this user
USER2 will be a regular, normal user, without administrator right or any other special permissions.
Now, add your computer PC-NAME to a domain. You will add your computer PC-NAME to (for example) the domain ABC.
Now restart your computer.
Now your pc is a member of the domain ABC.
At this point you will log in your computer locally as: PC-NAME\USER1
When you are logged in as PC-NAME\USER1 you have administrator rights to disable your current account.
So you will disable PC-NAME\USER1 and you will see that by default PC-NAME\Administrator is also already disabled.
So when both PC-NAME\USER1 and PC-NAME\Administrator are disabled, you will restart your computer.
When your computer is back on you are asked to log in again.

Try to log in as a local user with administrator rights! For as far as I know, you have a computer without a accessable administrator account.
Can you get the administrator enabled again?

You could try to enable the built-in hidden admin account:

Built-in Administrator Account - Enable or Disable

James

Hi James,

I tried to enable the built-in hidden administrator account, but you need administrator rights to enable an administrator account. So currently I have 3 accounts on my computer:

(disabled account) Built-in hidden administrator (I did not configure a password)
(disabled account) USER1 = account with administrator rights (I configured a password)
(enabled account) USER2 = account without administrator rights (I did not configure a password)

So I cannot activate the built-in hidden administrator account when logged in as USER2. Is there any way to get my administrator account back working?

It was very easy to disable the only administrator account. Windows 7 did not prompt me that I was about to disable the only administrator account. It just did what I asked without warning me.

Thing was, I thought that USER2 was an administrator, but afterwards turned out I made a mistake and made USER2 just a regular user. So was then left without an enabled administrator account.

Yeah, I have already reinstalled the system now. Too bad, but good lesson for next time. Thanks for the replies.