Follow these steps to automatically repair Windows Firewall problems:
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Select the Download button on this page.
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In the File Download dialog box, click Run or Open, and then follow the steps in the Windows Firewall Troubleshooter.
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This troubleshooter might be in English only. However, the automatic fix also works for versions of Windows in other languages.
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If you’re not on the computer that has the problem, save the troubleshooter to a flash drive or a CD, and then run it on the computer that has the problem.
What it fixes
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Windows Firewall isn’t the default firewall
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Windows Firewall doesn't start
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Windows couldn’t start Windows Firewall (Service-specific error 5 (0x5))
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Remote Assistance isn’t working because it’s blocked by Windows Firewall
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You’re unable to access shared files and printers because sharing is blocked by Windows Firewall
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BFE service is missing
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Firewall won’t start (Error Code 80070424)
Runs on
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Windows 7
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Windows 8
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Windows 8.1
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Windows 10
