getting minvalid copy message

im getting a message thats telling me i have an invalid copy of windows xp how do i fix this i have had my p.c. for three years

 

In nearly half the cases where this message appears there is nothing dodgy about the XP installation.

Use your mouse and copy/paste the below into a new Notepad session:

Do a File, Save as, fix_wga.cmd

Double click fix_wga.cmd

Agree to the changes when prompted. Ignore any errors.

When it finishes, reboot your computer.

Now download the Windows Genuine Advantage Diagnostic Tool:
http://go.microsoft.com/fwlink/?linkid=52012

Run this tool.
One the first screen click "Continue "
One the second screen click "Resolve "

Hopefully it will automaticly resolve your status.

If it does not, please advise.

The following Microsoft KB article has specific steps to take first though if there are errors:
http://support.microsoft.com/kb/916247

If no joy is found from the MS KB discussion: