content_gremlin SimsSinceY2K alokaaii The usual cause of a white screen when loading a new world is T.O.O.L., so remove that if you have it. The "game ownership disabled or deleted" error when repairing is a known issue with its own master thread:
Fairy Garden EA app Error - "Game Ownership Disabled or Deleted" | EA Forums - 12331060
content_gremlin The white screen when trying to launch the game at all is a different matter. If you haven't already, please try playing in a clean user folder. Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop. When you launch the game, a clean folder will spawn with no content. (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.) Don't add anything to the new folder yet; just start a new save and see how it runs, that is if you can get that far.
If that doesn't help, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.
alokaaii Please create your own thread describing your issue, and provide a dxdiag and a screenshot of any error message you see as well.
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