Quickbooks install diagnostic tools that let you fix all your QuickBooks errors in a jiffy. All you need is to install the software on your device and you come over any problem that you might be facing with your QB software. This allows you to fix your QB issues on your own without reaching any technical support. However, the installation procedure of the QuickBooks install diagnostic tool can give you some hard time if not done properly. You can install this diagnostic tool simply by downloading it from the official QuickBooks website. Save the downloaded file on your preferred location and double click on it to install. Open the tool and follow the on-screen steps to troubleshoot your issue.