When Windows Xp activation time period expires and you see error message like this
Then to set windows Xp to its previous licensing stage that is for 30 days activation time period, follow this procedure as mentioned below:-
Boot into “Safe Mode”. To do this, turn the laptop on and press F8 as it is booting up. Go into “Safe Mode” by choosing the “Safe Mode” option. Once you are at the desktop in “Safe Mode”, Click “Start” then click “Run”.
At the run command prompt type the following EXACTLY
Note That: The “Oo”‘s in Oobe are “oh’s” – not “zero’s” There is one space after rundll32.exe. It is case sensitive as far as I know.
Wait a few seconds – the screen may blip a few times or so.
This just reset Windows Activation for 30 days.
Reboot the PC into normal mode – log in – re-activate Windows.