A QuickBooks file doctor is a program developed to help detect and repair damaged company files. The software can also help troubleshoot network issues with QuickBooks. With this tool, you can troubleshoot and repair many common problems with your QuickBooks company file and QuickBooks network. Currently, QuickBooks file doctor combines two diagnostic tools that were previously used. Engineers at Inuit subsequently combined their network diagnostic tools with their data damage repair tools into a new tool known as the QuickBooks file doctor.