The installation of Windows Media Player is not properly done

Every time I login to the computer an error message pops up.
The error message displays that ‘The installation of Windows Media Player is not properly done.
So it is to be re-installed.
You can install the same for MS website.’ It contains the ‘No’, Yes’ and ‘Close’ options.
This problem started after the installation of Windows Media Player.
I have re-installed the application from their website, but there was no change in the error message.
I am using windows XP Pro SP 2 and McAfee anti virus. Please help me to fix the problem.
I will thankful for all help and support.
