Welcome to the Community, Craig303.

I've reviewed our ongoing investigation (INV-71226) about this and can confirm there's some steps you'll want to try performing to suppress any open windows from loading when opening your company file.

Here's how:

1. Open QuickBooks and the company file.
2. Enter your admin credentials, then sign in.
3. After clicking Ok/Continue, press and hold the Alt key on your keyboard.
4. When the file loads completely, go to Edit, then Preferences.
5. Access your Desktop View section.
6. Confirm the Show Home page when opening a company file option is turned off.
7. If it isn't activated yet, tick Don't save the desktop.
   
8. Select OK.

Now you should be able to close your company file and open it without having to press/hold Alt.

I'd also recommend getting in touch with our Customer Care team and referencing the investigation's case number (INV-71226) if you haven't yet. This enables them to add your account to our list of affected subscribers. Once you've been added, you'll receive email notifications about any updates relating to it.

If there's any questions, I'm just a post away. Have an awesome day!