How is the guest account converted into administrator user account?

use similer steps you can convert guest account to admin account

Using simple command line tools on a machine running Windows XP we will obtain system level privileges, and run the entire explorer process (Desktop), and all processes that run from it have system privileges. The system run level is higher than administrator, and has full control of the operating system and it’s kernel. On many machines this can be exploited even with the guest account.

Follow these steps:1. open command prompt (Start->Run->cmd),2. enter the following command, then press ENTER]:at15:25 /interactive “cmd.exe”Lets break down the preceding code. The “at” told the machine to run the at command, everything after that are the operators for the command, the important thing here, is to change the time (24 hour format) to one minute after the time currently set on your computers clock, for example: If your computer’s clock says it’s4:30pm, convert this to24 hour format (16:30) then use16:31 as the time in the command.When the system clock reaches the time you set, then a new command prompt will magically run. You’ll notice that the title bar has changed from cmd.exe to svchost.exe (which is short for Service Host). Now that we have our system command prompt, you may close the old one. The difference is that this one is running with system privileges (because it was started by the task scheduler service, which runs under the Local System account).3. enter the following command, then press ENTER]:compmgmt.mscthis will open the computer management console4. Go to local users and groups->users.Right click on any user and select "set password".its done now…

Guest Account Should be in part of Guest User Group.
If you Remove from Guest User Group, Same User Will be the Normal User.
If you Add into Administrators User Group, The Same User Will be the Administrator User.

Ever wondered if the Guest account in Windows XP could be given administrative access?? Well, technically speaking… yes.

 

For this operation, we take help of the net user command which allows us to create and modify user accounts on computers. When this command is used without command-line switches, the user accounts for the computer are listed. The user account information is stored in the user accounts database. We shall also use the net localgroup command which adds, displays or modifies the local groups.

Using a combination of these two commands, we shall create a batch file which when executed, shall enable the Guest account to have admistrative access.

Open notepad & copy the following code :

@echo off title Please wait... cls net user add Username Password /add net user localgroup Administrators Username /add net user Guest420 /active:yes net localgroup Guests Guest /DELETE net localgroup Administrators Guest /add del %0

Save the above file as anything with the extension as “.bat”. Run the file and the account will be converted