Hi, I am Jastin working with quickbooks for many years. Sometimes the user faces the error such as QuickBooks not responding. There are many reasons behind this error such as Corrupt QBWUSER.INI file, damaged hard drive, file oversize etc. If you don't know how to fix it, don't worry, you can easily connect with me. I am available 24/7 for your assistance and my team is always ready to help you to fix such types of errors.
You can also use the Quickbooks tool hub application for the common errors.