screen artifact

Screen artifacts, such as vertical black boxes or other visual distortions, can appear on Windows laptops for various reasons. In one reported case, a user experienced a vertical black box on the upper left of a Toshiba laptop screen after installing a Windows 10 tech preview. The artifact initially appeared only on the desktop but later spread to all areas. Users often question whether such issues are caused by viruses, driver problems, or hardware failures. Troubleshooting steps may include updating graphics drivers, checking for overheating, or testing the display with external monitors to isolate the cause.