While you are working in QuickBooks Desktop, you may see this message:
A number of issues can cause this error message. Among them are:
Check your network resources. Close then reopen QuickBooks. If you still receive the error message, proceed with the following steps.
On your Windows taskbar system tray, see if Windows is installing an update. If it is or if it needs to be installed, let it finish. Restart your computer as directed by Windows. If no update is running, proceed with the next step.