QuickBooks File Doctor is a diagnostic tool developed by Intuit, the company behind QuickBooks, which is accounting software. The QuickBooks File Doctor is designed to fix a range of issues that users may encounter when working with QuickBooks company files, such as data corruption, network errors, and other related issues.

The QuickBooks File Doctor is part of the QuickBooks Tool Hub, which is a collection of tools and utilities designed to help users troubleshoot and fix common QuickBooks issues. The File Doctor tool scans and repairs damaged or corrupted QuickBooks company files, as well as check the network configuration to ensure that it is set up correctly.

Overall, the QuickBooks File Doctor can be a useful tool for QuickBooks users who are experiencing issues with their company files or network setup. However, it's important to note that the tool has its limitations, and it may not be able to resolve all issues that users encounter. In some cases, users may need to contact QuickBooks support for additional assistance.