I just bought a new 22 inch monitor (Acer X223W) and call of duty 4 kept on having the same message: "the program has stopped working". Here are the specs for my pc: Motherboard: ASUS Maximus Formula Special Edition CPU: Core 2 Quad Q6600 Sound: Supreme FX 2 RAM: 4GB OS: Windows Vista Home Premium Video Card: ASUS EAH3870 DDR4 512MB PCI-E 2.0 Monitor: ACER X223W 1680 x 1050 Hard Drive: 500GB 7200 RPM Thanks!