Can't turn on the Windows Firewall in the Security Center

Diagnose and fix the problem automatically

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On a computer that is running Windows Vista, the Windows Security Center warns you that the Windows Firewall is turned off. When you click Turn on now in the Windows Security Center to turn on the Windows Firewall, you receive the following error message:
Security Center can't turn on Windows Firewall.

In the Services console, you notice that the Windows Firewall service is not running even if the service is configured to start automatically. When you manually start the Windows Firewall service, you receive the following error message:
Windows could not start the Windows Firewall on Local Computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code 5.
Note To open the Services console, Click
Start the Start button , click Run, type Services.msc, and then click OK.


This problem can occur if the account that is used to start the Windows Firewall service does not have permissions to access the related registry entries.

How the MATS package works to fix this problem

  1. The MATS package scans your computer and detects if the following requirements are met:
    1. Windows Firewall is the default firewall.
    2. The computer is running Windows Vista.
    3. The Windows Firewall service is not started.
    4. The following event is logged in the System event log in the past 10 days.
  2. If all the requirements are met, the MATS package adds appropriate permissions to the the NT Service\MpsSvc account on certain registry entries.
    Registry entryPermissions
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\EpochQuery Value; Set Value
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicyFull Control; Read
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Defaults\FirewallPolicyFull Control; Read
  3. Start the Windows Firewall service.
  4. Verify that the Windows Firewall service starts successfully.

Other issues that the MATS package fixes

2292301 You can't access shared files or printers in Windows
2288085 You get a security warning telling you that the Windows Firewall is turned off
2289618 You can’t use Remote Assistance to offer assistance

Artikkelin tunnus: 2271812 – Viimeisin tarkistus: 29.2.2012 – Versio: 1