You downloaded a corrupted file or a Linux/macOS version. Ensure the file ends in .exe and is between 3 MB and 8 MB.
If you have a specific Flash file (like a game or old presentation) saved on your PC: download adobe flash player 9.0 for windows 10
Even though IE11 is modern, it has a legacy mode that supports older ActiveX controls. You downloaded a corrupted file or a Linux/macOS version
The installer will detect the newer, integrated Flash components in Windows 10 and abort the installation, or the installer simply crashes due to compatibility issues with modern system libraries. download adobe flash player 9.0 for windows 10
When Flash Player 9.0 was dominant (2006–2008), the internet was largely a 32-bit environment. Flash Player 9 was primarily a 32-bit ActiveX control or NPAPI plugin.