or try this
Start/Run - type "regedit" without the quotes, click OK
Delete these Registry keys if they exist:
HKEY_LOCAL_MACHINE\SOFTWARE\Polici_es\Microsoft\WindowsFirewall
\DomainProfile \EnableFirewall=0 (DWORD data type)
HKEY_LOCAL_MACHINE\SOFTWARE\Polici_es\Microsoft\WindowsFirewall
\StandardProfile \EnableFirewall=0 (DWORD data type)
WARNING - editing the registry could cause your PC to be unusable.
After, you've deleted the files above, you must restart your computer to inable Firewall again.
Start/Run - type "regedit" without the quotes, click OK
Delete these Registry keys if they exist:
HKEY_LOCAL_MACHINE\SOFTWARE\Polici_es\Microsoft\WindowsFirewall
\DomainProfile \EnableFirewall=0 (DWORD data type)
HKEY_LOCAL_MACHINE\SOFTWARE\Polici_es\Microsoft\WindowsFirewall
\StandardProfile \EnableFirewall=0 (DWORD data type)
WARNING - editing the registry could cause your PC to be unusable.
After, you've deleted the files above, you must restart your computer to inable Firewall again.