A. 1. Check your display settings: Go to your computer's display settings and ensure that the refresh rate is set correctly. Right-click on the desktop, select 'Display settings', scroll down to 'Advanced display settings', and adjust the refresh rate to the recommended value for your monitor. 2. Update your graphics drivers: Outdated graphics drivers can cause screen flickering. Go to the manufacturer's website (like NVIDIA, AMD, or Intel) and download the latest drivers for your graphics card. Install them and restart your computer to see if the issue persists.

B. 3. Disable hardware acceleration: In some applications, hardware acceleration can cause flickering. Go to the settings of the application where you experience flickering, find the option for hardware acceleration, and disable it. Restart the application to check if the flickering stops.