|"XP Antivirus 2012 IS a virus! You're going to have to deal with that issue 1st."|
XP Antivirus 2012 is a "Rogue" anti-malware program. It's not a virus, it's a legitimate program, but the tactics used by the maker of it - causing you to load crap that some of which may be malware intentionally - to try to trick you into buying it are considered to be unethical.
Malwarebytes will probably get rid of it and it's faked symptoms.
See response 1:
Ignore the part about loading your latest System Restore restore point unless you did what the guy in that Topic said he did in the first post - loaded a previous restore point.
Most malware these days is not a virus - it's something else.
The crap that was caused to be loaded by the maker of the "rogue" anti-malware software may include (a) trojan(s) or other malware.
"I tried to create another account called 'administrator' but it says that that account already exist!"
XP has a built in user account spelled exactly Administrator. You can't have two user accounts that have exactly the same characters for the name, and in the case of that account, it probably doesn't matter whether the letters you use are upper or lower case, you still can't have any other user spelled exactly Administrator.
If you look at C:\Documents and Settings\.... one of the user subfolders is always Administrator by default.
You don't see the Administrator user listed on the Logon screen when you boot normally by default - you only see that user choice when you choose to load Windows in Safe mode.
You don't see the Administrator user listed in Control Panel - (Classic view) - User Accounts unless you have chosen to load Windows in Safe mode.
(Press F8 repeatedly while booting the computer, don't hold down the key, starting very early in the boot sequence or right after the led for your display turns the color it is when you have video in Windows, and when the Windows loading choices menu appears, choose Safe mode, or Safe mode with networking if you need access to the internet.)
The Administrator user has no password by default. It's not a good idea to make one. If you or whoever uses the computer want to be able to use the Recovery Console when you boot the computer from an XP CD, if you or whoever made a password for Administrator, that password must be supplied.
Administrator rights or privileges is a different topic. Your user often must have administrator rights or privileges - be an administrator - in order to be able to do certain things, including the user must have those in order to be able to install many programs.
All users of XP have administrator rights or privileges by default, except for the optional Guest account, but that can be changed so a user has limited rights or privileges, and that can't be changed back to administrator rights or privileges by that user - only whatever user that has administrator rights or privileges can change that.
There is a Guest account that can be enabled in Control Panel - (Classic view) - User Accounts by any user with administrator rights or privileges - that Guest user always has limited rights or privileges.