If a yellow border appears on your PC screen when taking screenshots, it may be caused by a system feature or third-party application. Check for any screen recording or annotation software that could be activating this border. Try pressing the “Esc” key or closing the application to exit the border. Additionally, ensure that your screenshot tool or keyboard shortcuts are not conflicting with any other software. If the issue persists, consider restarting your computer or checking for updates for PC screen to the screenshot tool. If the problem continues, it may be helpful to seek assistance from the support resources of the specific software you are using.