I can see where you're coming from, Susan.

Getting back and forth isn't easy. I wish you didn't have to experience getting error codes when working in QuickBooks Accountant Desktop (QBDT). I'd also like to acknowledge your effort in updating your QBDT to resolve the issue. No worries, let me provide the necessary fixes so you can continue with the tax planning for your clients.

Before we troubleshoot, let's make sure to create a backup of your company file.

First, we can open your company file with a different QBDT user. To do that:

1. Go to the Company menu, select Set Up Users and Passwords and click Set Up Users.
2. Click Add User, type the username and password and click Next. Please don't use the damaged user name.
3. Customize the user as necessary and click Finish.
4. Go to the File menu and select Close Company/Logoff.
5. Log in to the company file using the new login credential.

If the new user doesn't resolve the issue, let's create a new Windows admin. If you're using Windows 10 and newer, here's how:

1. Click Start, then Settings, then click Account, and select Family & other users.
2. Select Add someone else to this PC under Other Users.
3. Select I don't have this person's sign-in information, then select Add a user without a Microsoft account.
4. Enter the name of the new account and click Finish. You may also assign a password to the new account to ensure security.
5. Select the newly created account and choose Account Type.
6. Select Administrator and click OK.

For additional fixes, please see this article: Troubleshoot Unrecoverable Error XXXXX XXXXX. 

If the issue persists after performing the suggested steps in the article, I'd recommend reaching out to our customer support. They'll be able to use a screen-sharing tool that will better help you in resolving unrecoverable errors.

In addition, here's an article you can read to know more about the limitations of an accountant's copy in QBDT: Use the Accountant's Copy. 

Feel free to reply to this thread if you need additional assistance with getting rid of unrecoverable errors. We'll make sure to address your every concern here in the Community. Stay safe.