This usually happens due to missing or corrupt SharedAccess reg key, which represents the Windows Firewall Service.
Resolution
Download sharedaccess.reg (for Windows XP SP2 only) and save to Desktop. Then double-click the file to merge the contents to the registry. The Services entry will be created. Restart Windows (mandatory step, otherwise the following NETSH command will display an error message).
After restarting Windows, run the following from Command Prompt (cmd.exe)
NETSH FIREWALL RESET
Launch firewall applet from Control Panel, and then configure your Windows Firewall settings.
If nothing helps, as a last-resort solution (before reinstalling Windows XP Service Pack 2), give these two commands a try. Click Start, Run and type:
rundll32 setupapi,InstallHinfSection Ndi-Steelhead 132 %windir%\inf\netrass.inf
Restart Windows, and then run this command (from Command Prompt):
NETSH FIREWALL RESET
Attempt to start Firewall applet. Start the Windows Firewall service if prompted.
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further to above problem,discovered windows security centre, will not launch!!!!!!
allcoppers.
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