The HWInfo OSD functionality is based on Intel's PresentMon, which means it can monitor things like in-game FPS and frame-time (in milliseconds), but that means it loses Windows XP support.

To get rid of a crosshair that's stuck on your PC screen, check your monitor's On-screen Display settings, disable Crosshair Bloom in game settings, etc.

If the Power button and the on-screen display (OSD) menu are both locked, try doing a hard reset. Disconnect all cables (HDMI, DisplayPort, etc.) and the monitor’s power cord.

The Alienware AW3423DW's on-screen display menus are pretty typical and have an easy-to-navigate interface. The bottom-center of the display has a joystick built in with an integrated button ...