PCSX2 requires a PS2 BIOS to function. You can either:
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PCSX2 1.2.4 is a stable version of the PCSX2 emulator, released on August 24, 2014. This version is considered one of the most reliable and compatible with a wide range of PS2 games. It supports Windows-based systems, from XP to 8.1, and is compatible with both 32-bit and 64-bit architectures. pcsx4124setupzip link
After installation, you need to configure PCSX2 1.2.4 to optimize its performance and ensure compatibility with your PS2 games. The following settings are essential: PCSX2 requires a PS2 BIOS to function