Do you need Microsoft Silverlight if you have Adobe Flash?

No, you do not need Microsoft Silverlight if you have Adobe Flash, as both are separate web technologies designed for similar purposes, such as creating rich internet applications and multimedia content. However, certain websites or applications may require one or the other, so it depends on the specific requirements of the content you are accessing. It's worth noting that both technologies have seen a decline in usage, with many modern web standards like HTML5 now replacing them.