Windows XP Home does not recognise Administrators rights

[seaturtel]

Hello, windowsxp does not recognize me as the administrator

 

[PhilFrisbie]

You need to log in as the Administrator and then give your account administrative rights.

 

[seaturtel]

You need to log in as the Administrator and then give your account administrative rights.

According to the user accounts I am Computer Administrator, also, I am logged in as one.
What do you think may be the problem and how to resolve it?