If Windows Firewall is blocking QuickBooks, it can disrupt your accounting tasks. Start by adjusting the firewall settings to allow QuickBooks access. Go to Control Panel, find Windows Defender Firewall, and select "Allow an app or feature through Windows Defender Firewall." Add QuickBooks to the list and ensure both private and public network boxes are checked. After making these changes, restart QuickBooks to ensure it runs smoothly without interruptions from the firewall.

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