If you specifically want the original 2006 standalone version (perhaps for nostalgia or specific character-customization features), you can still find physical CD-ROM copies on secondary markets:
If you manage to install the 2006 version, you might run into issues with high refresh rate monitors. You may need to manually cap your frame rate or use tools mentioned on sites like PCGamingWiki to ensure the game runs smoothly on . Download LEGO Star Wars 2 PC Game 2006
: You can often find used and even sealed copies for as low as $5.00 . If you specifically want the original 2006 standalone