Repairing the QuickBooks Desktop for Windows is quite easy. Go to the QuickBooks Tools Hub and from there, run the Quick fix my program option. To use this, you first need to download this tool. The second option is the best option to be used here. Download the QuickBooks Install Diagnostic Tool and run it. This will delete all the possible QB errors on your desktop. This will take up to twenty minutes or so. For the very recent fixes and for the security update, make sure to get your QB updated to its latest version.