Re: Unable to start game Service initialization failed (0x065d0274)
@LOL44l This error is often related to broken or missing registry references, among other things. So the first question is, did you uninstall any packs without removing their associated registry entries? Do you use a cleaner app that might have interfered with or removed some of the entries? Did you try to move the game's install location after the fact? What kind of install is this: EA App, disc, Steam, or something else?
Additionally, if you use a third-party antivirus, please try disabling it long enough to test Sims 3. It's possible that you'd also need to repair the game with the antivirus disabled, which you can do in various ways depending on the type of install. In the EA App, it's under Manage > Repair; Steam has Properties > Local files > Verify integrity of the game files; disc installs need the Super Patch.