If you see QuickBooks Error 80029c4a and can’t open QuickBooks Desktop, we’ve got you covered. This QuickBooks error should be resolved with the latest release of QuickBooks Desktop 2018, 2019, and 2020! If you still get the error, even with an updated QuickBooks release, start by checking your antivirus software. If that doesn’t work, we’ll walk you through how to reinstall QuickBooks Desktop.