At the point When QuickBooks says the document is open, it indicates that the No Company Files window is as of now open or qbw32 exe running in background in the Task Manager. This causes your program and forestalls you to get to it appropriately.
find different error messages on your screen. These are specified below
Problem: QuickBooks could not be started because it is already running the maximum number of instances.
QuickBooks can’t start because it is already running. Only QuickBooks
Accountant and QuickBooks Enterprise can open more than one company file.
An empty QuickBooks window already exists, so QuickBooks will use that window.
On the off chance that you at any point experienced such issues while restarting the PC, the primary move you should make is to kill the keep QuickBooks running for Quick Startups feature.