A common bug on newer Windows versions causes the mouse to stop working in-game. This can often be fixed by installing community patches like SilentPatch .

The game also features a variety of characters, including:

It looks like you’re trying to get to run smoothly on a Windows 7 32-bit system, and the number “13” might refer to a specific game version (like v1.03), a mod pack, or a save file number.

If “13” refers to a (e.g., “GTA SA v13” from modding communities), note: