Convert Windows XP SP2 to SP3 without any set up program.

If there is a version of windows xp SP2 is installed in your computer. You can change into SP3:

go to start---->Run--> type the word ‘Regedit’ 

Go to HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\ Control\ Windows

Than please modify CSDVersion from ‘200’ to the Windows XP SP3 value of ‘300’ and than reboot your computer. 

You are all done. Now your computer is xp SP3.

Click on My Computer>Properties than you will be shown your system information.

Thanks.