The most reliable way to fix this is by using the by ThirteenAG. 1. Download the Essential Fix
Download the latest build from the Widescreen Fixes Pack website.
The gold standard for this issue is the GTA SA Widescreen Fix. It doesn't just unlock 1080p; it fixes the UI scaling so your map and health bar aren't stretched horizontally. gta-san-andreas-1080p-resolution-fix-file
Using the ThirteenAG Widescreen Fix corrects the aspect ratio and scales the interface perfectly to 16:9 or 21:9 monitors.
You will need an ASI Loader (often included in the download) to run the fix. 2. Installation Steps Extract the Files: Open the .zip file you downloaded. The most reliable way to fix this is
If you experience weird physics (like cars not reversing or swimming being impossible), ensure the Frame Limiter is ON in the display settings, or use SilentPatch to cap it at a stable 60 FPS.
Open the game, go to Options > Display Setup > Advanced , and you should now see 1920x1080 available in the resolution list. 3. Pro-Tips for the Best Experience The gold standard for this issue is the
If your mouse stops working in the menus, the InputMod or SilentPatch usually resolves this "Windows 10/11 bug." 4. Why Use a "Fix" File?