User lock when switching to single-user mode

Hello @Brian246,

Thank you for posting here in the Community space about the issue when changing to single-user mode. I know how this unusual behavior affects your productivity so let me help you fix the problem in QuickBooks Desktop.

Since you can get back on track by force closing the program, the issue may be related to data damage. There are troubleshooting steps you can perform to resolve the issue and fix the problem completely.

Before you begin the basic troubleshooting, I suggest you start by updating QuickBooks Desktop to the latest release. Aside from improving software performance, this process fixes common and complicated errors.

Here's how:

1. Click the Help tab in the upper-right corner, then select Update QuickBooks Desktop.
2. Go to the Update Now tab.
3. Select the updates you want to include.
4. Put a checkmark on the box beside Reset Update.
5. Hit Get Updates.
6. Close and re-open QuickBooks.

After following the steps I've shared above, let's proceed with running the Verify Data and Verify Rebuild tools. These options will help self-identify data issues within a company file and self-resolve them using Rebuild Data. 

To run Verify Data:

1. Click the File tab at the top menu bar.
2. Hover your cursor to Utilities.
3. Select Verify Data.

For the Rebuild Data option, here's how:

1. Click the File tab at the top menu bar.
2. Hover your cursor to Utilities.
3. Select Verify Rebuild.

Lastly, restart your QuickBooks and switch to single-user mode. You should be able to change between modes without force closing the program.

You can also check this article for more details about how to use the QuickBooks Tool Hub to repair QuickBooks: Fix common problems and errors with the QuickBooks Desktop Tool Hub.

Drop me a comment below if you have any other questions about navigating QuickBooks or using multiuser mode. I'll be happy to help you some more.

I did update, verify and rebuild yesterday before leaving. This morning it locked me up the first time trying to switch to single-user mode. I have not yet tried the Tool hub and will look at it today.

I did try the tool hub yesterday. Since the problems has been sporadic we will see if the problem continues.

When working with one of my QuickBooks Files today QB was froze again after trying to switch from Multiuser to single user mode. None of the fixes above have worked.

Thanks for sharing the things you've done so far, Brian246.

I'll provide additional troubleshooting steps to resolve the freezing problem while switching from multi-user to single-user mode.

When you switch from multi-user to single user, is there another user accessing the same company file? Any information can help us determine the best course of action for resolving QuickBooks Desktop's freezing issue.

Several things can cause QuickBooks to freeze. Here are several instances:

• QuickBooks Desktop is outdated.
• Windows operating system is out of date.
• The company file may be damaged.
• The company file may be too large.
• The company file location may not have enough space.
• QuickBooks Desktop software may have been damaged.

Let's check if there are no pending windows updates on your computer. After that, we can run a repair on your QuickBooks Desktop program to make sure no components are missing.

Here's how:

1. Restart your computer.
2. Open the Windows Start menu, then click Control Panel.
3. Select Programs and Features, then Uninstall a Program.
4. Choose QuickBooks from the list of programs, then click Uninstall/Change.
5. Select Continue, or Next.
6. Click Repair, then Next.
7. Once it's done, hit Finish.

If the issue persists, I suggest contacting our QuickBooks Desktop Support. They have the resources to access your account and open a ticket for further investigation.

I've also added this article to learn how to fix if you're unable to open your company file for future reference: What to do if you can't open your company file in QuickBooks Desktop.

Let me know if you need further assistance in QuickBooks. I'll be around to help you.