THERE'S AN ERRROR! Back when everyone had Windows XP, these error boxes would take over your screen and crash your computer in response to an error. Sometimes, this popup mess meant you had a virus or malware on your PC desktop. Use this video effect whenever things are going completely wrong. The green screen is already replaced for you -- just upload an image or video to the background behind this transparent video overlay. Then, export to save the Windows Error Video Effect or incorporate it into a larger video project.