IvyYuuki Okay, please create a new admin Windows account and try playing there. Make it local, as in, don't link it to your Microsoft account or any email address. (You can keep declining until you're asked some security questions instead.) In the new account, you won't need to reinstall the game itself or your packs, but anything you own in Marketplace will be gone for now, as will your saves and other user content. That can be addressed later if necessary, but for now, just see whether you can play.
If that doesn't help either, please look for new errors in the Reliability Monitor. Click Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day. Today is on the right.
Look for any errors that happened while you were trying to play in the new account. If you find one, double-click it to see more details, then copy that info and paste it into a reply here. If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.