This isn't the kind of service that we want you to experience especially for a long-time customer like you.
Let me make it up by providing the steps that will fix the issue.
When you install a QuickBooks product, not only are you installing the base product but also a variety of add-ons to assist in your usage of that product, such as the QuickBooks Web Connector.
By default, the installation of the QuickBooks Web Connector enables the program to launch every time you turn on your computer. Running this program in the background if it's not needed can take up unnecessary resources.
However, we can disable this one from launching when you turn on your PC by deleting the appropriate startup entry.
Open the Start menu and click All Programs.
Click Startup, followed by QuickBooks.
Right-click Exchange DataWith Web Services.
Select Delete followed by Yes to disable the QuickBooks Web Connector from automatically launching at startup.
That's it! Please let me know if there's anything else I can do to be of assistance. Wishing you and your business continued success in all that you do.