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Error: QuickBooks can't start because it is already running

When you restart your computer or open QuickBooks Desktop, you see one of the following messages:

  • QuickBooks can't start because it is already running. Only QuickBooks Accountant and QuickBooks Enterprise can open more than one company file.
  • Problem: QuickBooks could not be started because it is already running the maximum number of instances.
  • An empty QuickBooks window already exists, so QuickBooks will use that window.


QuickBooks Quick Startup is a feature that enables QuickBooks Desktop to load your company file faster by leaving the QuickBooks Desktop application process (QBW32.exe) running in the background.

How to fix it
  1. Reboot your computer.
  2. Open QuickBooks Desktop as Administrator.
    1. Close QuickBooks Desktop.
    2. Right click the QuickBooks Desktop icon and select Run as administrator.
    3. Enter your administrator login credentials
KB ID# SLN41846
12/5/2016 12:39:52 PM
PPRDQSSWS407 9138 Pro 2017 e79fe9