I'm here to help and ensure to isolate this problem so you keep your QuickBooks up and running.
Let's process troubleshooting steps to fix the problem and get back to focusing on your business. First, let's download and use the QRefresher Tool. This will helps you end the QuickBooks processes, and performs a mini-repair to ensure that things are in proper order.
Let's run the tool, then try to re-open your QuickBooks: dlm2.download.intuit.com/akdlm/SBD/QuickBooks/QBPDF/qbrefresherv1.exe.
Next, you need to suppress the QuickBooks Desktop application if there's damaged with your company file. Here's how:
Once done, let's restart your computer to clear processes and temporary data that may be hogging your system resources. Try to open QuickBooks after restarting.
If the issue persists, please check this article, and scroll-down to Solution 4 then follow the next troubleshooting steps: QuickBooks Desktop doesn't start or won't open.
Please let me know how it goes by clicking the Reply button below. I'm just a post away if you have other questions about opening QuickBooks.