Windows 10 is a 64-bit operating system that has little to no compatibility with 16-bit installers (older versions of Flash used 16-bit). Additionally, Flash 5 was designed for Windows 98, 2000, and ME.
If you are determined to find the software, look for reputable internet archive repositories (such as the Internet Archive's software collection) where users have preserved original CD-ROM ISOs. Always scan any downloaded macromedia flash 5 free download for windows 10
Once you find the installer, getting it to run on Windows 10 requires a few extra steps. Because Flash 5 was built for Windows 98 and XP, the installer might hang or fail to launch. To fix this, right-click the setup file, go to "Properties," and navigate to the "Compatibility" tab. Check the box to "Run this program in compatibility mode for" and select Windows XP (Service Pack 3). You should also check the box to "Run this program as an administrator" to avoid permission errors during the installation process. Windows 10 is a 64-bit operating system that