Multiuser

Thank you for providing details of your concern, @JM76.

The following are some reasons for QuickBooks multi-user mode not working: 

• QuickBooks is not installed on the server.
• Possibly that the hosting settings are not properly configured.
• Firewall or antivirus software is not allowing communication between user computers.
• The database server is unable to open the company file.
• Windows file permissions are not properly set.

To resolve this, here are some troubleshooting steps that we can perform:

First, check the folder permissions on your server computer, so we can make sure that the folder holding your company files has permission to be on your network.

Second, make sure that the QuickBooks Database Server Manager is installed on your server computer. This way, your company files will be shared with other computers over your network.

Next, set the Windows admin rights. This will let you change your firewall settings and folder permissions. 

Then, scan your folder using the Database Server Manager to access your file over the network.

Lastly, turn on hosting on your server computer:

1. Go to the File menu and hover over Utilities.
2. Select Host Multi-User Access. Then click Yes to confirm.

For more details, please visit this link: Set up a multi-user network for QuickBooks Desktop. 

You might also consider reading this handy article that will discuss you more about access limits in single or multi-user mode: Tasks that can be performed in a single or multi-user mode in QuickBooks Desktop. 

I think it's the antivirus software, I uninstalled it but when I run the scan in quickbooks tool hub, it's still popping up.

So, I thought maybe it's not uninstalled after all but I searched my programs and it's not there.