Hello, @Victory2.
We're glad to have you in the Community. Let's see if we need to run a QB Diagnostic Tool on all PC's.
The reason why QuickBooks Desktop could be running slow on all computers is that the host computer has the company file set up incorrectly. If the file is set up incorrectly, then this will allow latency when sharing across the network. Here's a link that can help you determine if the file is correct.
I recommend to ensure that the file is set up correctly before we run the Diagnostic Tool on all computers.
Feel free to reply, if you have any other questions. Have a great rest of your week!
