The QuickBooks Connection Diagnostic Tool assists the QB users and the professionals in settling the unwanted bugs. This tool is an essential feature that can be easily availed by QB users. A large number of errors can be easily resolved with the help of the connection diagnostic tool, which includes QuickBooks H-series, or -6000 series errors that are generally encountered while opening the company file. However, the fact that matters over here is that this tool is compatible only with Microsoft Windows 7, Windows Vista, or Windows XP with QuickBooks 2008 and the later versions. Steps to Download the QuickBooks Connection Diagnostic Tool • The very first step is to click on the official download link of the QuickBooks Connection Diagnostic Tool. • After that, save the aforementioned file in the system. • The next step is to open the installer named QBInstall_tool_vs.exe. • To move ahead, the user is required to shut down the running programs running in the background. • And then, click on QBInstall_tool_vs.exe to begin the installation. • The user is supposed to restart the program. • It should be noted that, in order to avoid any kind of further issue, the user should have a good internet connection. • Once done with that, clear all the applications in the background. • And finally, the software will eradicate all the errors that are being generated in the system. QuickBooks connection diagnostic tool is one of the most effective and helpful tools to fix various QB related errors. However, users might find it difficult to make use of this tool in the best possible way.