Install LEGO Island from your original CD or a legal digital copy
Copy the game files to a folder on your PC, such as `C:GamesLEGOIsland`
Right-click `LEGO Island.exe` or the main game executable
Open Properties
Go to the Compatibility tab
Check Run this program in compatibility mode for Windows 95 or Windows 98
Check Run this program as an administrator
Check Disable fullscreen optimizations
Click Apply
If the game still fails to start, install DirectX 5/6-era compatibility components if available from a trusted source
If the game has sound or video issues, try running it in a Windows 98 virtual machine
Use a virtual machine with Windows 98 or Windows XP if native compatibility does not work
If the CD version requires the disc, keep the disc inserted or use the original installer files
If the game crashes on launch, try setting the executable to 256 colors and 640×480 resolution in compatibility settings if available
If the game is too fast or unstable, try running it through a community-made compatibility wrapper for LEGO Island
If you use a wrapper, follow its included installation instructions exactly
Run the game from the installed folder instead of the CD when possible
Avoid installing it in `Program Files`
Keep the game folder in a simple path with no special characters
If Windows blocks the game, allow it through SmartScreen or antivirus only if you trust the source