: Open the Minecraft Launcher and select the new OptiFine profile.

Microsoft officially ended support for Windows 7, meaning the OS no longer receives performance or security updates. Similarly, modern Minecraft versions heavily rely on updated graphic APIs that Windows 7 struggles to process natively.

Copy the downloaded Opticraft .jar files into the mods folder.

The standard Microsoft Store launcher performs poorly on Windows 7. Utilizing a lightweight, third-party alternative bypasses telemetry overhead and simplifies mod management.

To help you get the absolute best performance out of your setup, let me know: