How to Change Windows Service Pack

Many times, new softwares, games require you to have the latest service packs to install. There's a way to bypass that.

For example, the latest GTA IV requires that
You can change your service pack 2 to display 3, or vice-versa.

Step 1:

Open the run option from the start meny and type in 'regedit' and press enter

Step 2:

Make a backup of your registry (just in case)

Step 3:

Browse to "HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\ Control\ Windows"

Step 4:

Modify the value of "CSDVersion" from "0x00000200" (SP2) to the Windows XP SP3 value of "0x00000300".

Step 5:
Close registry editor.
Step 6:
Reboot your computer.