Convert xp2 to xp3

~ go to start---->Run--> type the word Regedit

~ Your windows Registry Editor will open,

~ Go to HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\ Control\ Windows

~ Than please modify “CSDVersion” from “0×00000200” (SP2) to the Windows XP SP3 value of “0×00000300” and than reboot your system.

Now your Window has been upgraded to SP3 and you will be able to installed various advance softwares.

                                             OR                                                       

Download .Exe file from 
                                     
   http://www.microsoft.com/en-us/download/details.aspx?id=24