In iTunes for Windows, you can fix some authorization issues if you reset your User Account Controls. If you're not sure if your Apple ID has changed since you bought the item, check the purchase history of that Apple ID for the item to confirm that the item is on the list of purchases. If you forgot your Apple ID password, visit. Look to the right of 'purchased by' for the Apple ID that you used to buy the item.
If you don't see Remove Download, follow these steps: Select Remove Download, then redownload the item. If you see Remove Download, you're signed in with the Apple ID that you used to purchase the item.
You might have used a different Apple ID to buy the items that you want to play. To check, right-click the item and look for Remove Download in the menu.