If you have clicked the QuickBooks icon multiple times, then QuickBooks won't open. Thus, give QuickBooks some time to load. Besides, you may fix the issue using QuickBooks Tool Hub. download it from intuit’s official website. Install it and then launch it. Now, to fix the issue, select the tab Program Problems. Now, click on the option Quick Fix My Program. Once it fixes the program, launch the QuickBooks desktop and open your data file.