GPU acceleration conflicts with modern display drivers. Fix: Disable hardware acceleration globally:
Quick checklist
Today, you should treat Flash Player 12 ActiveX as a museum piece. Do not install it on your primary machine. Do not trust downloads from unknown sources. Instead, embrace modern emulation (Ruffle) or convert your legacy assets. The web has moved on to HTML5, WebAssembly, and secure-by-design standards. adobe flash player 12 activex
Installed Flash Player 12.0.0.44 and IE8 hangs on Flash content GPU acceleration conflicts with modern display drivers