DirectShow is a multimedia framework that was developed by Microsoft and introduced with Windows 98. It provides a set of APIs that allow developers to create multimedia applications, such as video players, audio editors, and webcams. DirectShow is also used by many popular applications, such as Windows Media Player and Adobe Flash Player.
The version of DirectShow that is installed on your computer can be important for several reasons. First, some newer applications may require a specific version of DirectShow in order to run properly. Second, some security vulnerabilities have been discovered in older versions of DirectShow, so it is important to keep your version up to date.