Network Lag Issue Single User Mode

Hi there, Erss. 

I appreciate you for running some troubleshooting steps to eliminate the issue. Since it didn't work, I have other troubleshooting steps to determine the main cause of this matter. Before we start, I like to lay some possible reasons for the unexpected behavior or performance issues with QuickBooks Desktop. Here are some: 

• QuickBooks is not updated.
• The computer does not meet the minimum system requirements.
• Damaged or missing QBWUSER.INI file.
• Corrupted hard drive.
• Damaged program files or QuickBooks Desktop installation.
• Damaged Windows operating system 

To get past this hurdle, let's use the QuickBooks Diagnostic Tool to automatically identify and fix this issue. Here's how: 

1. Download the QuickBooks Install DiagnosticTool.
2. Save the file to your local Desktop.
3. Close any open programs and run the QBInstall Tool.
4. Reboot the computer after running the tool to ensure the components are properly updated. 

You can also follow the rest of the solution if you're still having issues with QuickBooks:  QuickBooks Desktop won't open, has stopped working, or not responding. 

Also, if you have a large file and performance is slower than what is needed, you can reduce the size of your company file.

If the issue persists, you'd want to optimize your server and workstations to help minimize the issue. You can read through this article for the step-by-step instructions: Resolve QuickBooks Desktop performance issues - Manage your computers. 

Please know that you're always welcome to post if you have any other concerns. Wishing you and your business continued success. Stay safe!

We have none of the issues you mentioned, and also have ran all the diagnostic tools QB provides.  The program usually runs almost as fast as if you were running it locally in when the system 1st installs, then after a few days it slow down a lot.  Not sure what else we can do? 

Good evening, @Erss. 

Thanks for reaching back out to the Community. 

If you've done all of these troubleshooting, I recommend contacting our Customer Support Team again. They'll be able to review your account with some additional tools. Here's how: 

1. Go to the Help menu. 
2. Press the QuickBooks Desktop Help option. 
3. Click the Contact Us hyperlink. 
4. Enter your question and hit Let's talk. 
5. Scroll down and choose to get a callback. 

Let me know how the call goes! I want to ensure that you're able to get this taken care of. Bye for now!

I have literally spend 20+ hours with the agents on there.  Some agents will ask to charge you, and some will help for free.  Either way, I spend 20+ hours with agents to help, and they have ran through every single setting to try to make the connection faster.  It always ends in, you might want to try Online or Enterprise version.  Any other sets we can take beyond doing those options?