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
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