There is a "hidden" admin account called Administrator that is there as a kind of failsafe. It's sort of the master account, the equivalent of root on *nix systems. Best to leave it be. If you want to delete the Compaq_Owner account you can, just make sure you know what the Administrator account password is before you do.
According belarc I have two administrator accounts.
According to user accounts I have one administrator account.
In belarc they are named "Administrator" and "Compaq_owner".
In user accounts it is named "TOMROM"
If there are two admin accounts,can I delete one?