Access Denied When Trying to Start Windows Firewall

Most of the online crud I hobbled through to find a solution was just that – crud.

This seems to fix Access Denied error when starting Windows XP Firewall.

Open a run command and type:

services.msc click [OK]

Make sure Security Center is started, if not start it and make sure it is set to start Automatically.

Then try to start Windows Firewall

If that still doesn’t work:

Open a command prompt and enter:

rundll32 setupapi,InstallHinfSection Ndi-Steelhead 132 %windir%infnetrass.inf

Restart Windows, and then run this command (from Command Prompt):