How to Resolve QuickBooks Installation Errors Like QuickBooks Error 3371 . In addition, QuickBooks Error 12000 error Series like 12152, 12157, 12165, 12166 is also going to be resolved in other words, Lets Get Started .. Resolve Installation Errors by Deleting Damaged File Learn how to resolve installation errors by deleting damaged file in QuickBooks Desktop. Installation of QuickBooks Desktop requires you to enter a license number and a product code to complete the validation process. If the encrypted file containing the information is damaged, QuickBooks will not open. In those situations, deleting the entitlement file and re-entering your license and product information will help resolve the issue. We show you how. Common errors that can be fixed by deleting entitlement file The following are some issues and errors that can be resolved by deleting the entitlement file: " Error: The validation code is incorrect or the service is temporarily unavailable when a...