Sometimes, the "patched" label refers to the downloadable disc image (like an .iso file) itself. This image might have been altered so that the original, unmodified game installer accepts a generic or well-known key. However, the executable patch method is far more common for this title.
Before applying any patches, right-click the game shortcut, go to Properties > Compatibility, and set it to Windows XP (Service Pack 3) . Purchasing the Game Today
These are typically found on abandonware community sites or specialized game-fixing forums. 2. Community Patches & Compatibility Fixes