Tweak from SP2 to SP3

Step 1: Run Regedit by Clicking on Start -> Run , type in regedit and press enter
Step 2: Make a backup of your registry (just in case)
Step 3: Browse to "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetContr olWindows"
Step 4: Modify the value of "CSDVersion" from "0x00000200" (SP2) to the Windows XP SP3 value of "0x00000300"Step 5: Close