Now days most of the softwares and New games don’t run on XP Service pack 2 so, here is the simple and easy way to change windows XP service pack 2 to service pack 3 without any installation, downloading or formating.



Here are the simple steps.



Step 1: 
Run Regedit by Clicking on Start -> Run , type in regedit and press enter.



Step 2: 
Browse to “HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\ Control\ Windows”



Step 3: 
Modify the value of “CSDVersion” from “0x00000200”or “200” (SP2) to the Windows 
XP SP3 value of “0x00000300”or”300”.



Step 5: Close registry editor.



Step 6: Reboot.



now no warning will appear regrading upgrading of window and you can install al
software's and games.



if you want to Download all  the updates click the following link::