How to Register Windows Firewall

1. Click 'Start,' then 'All Programs' and open 'Accessories.'
2. Click 'Command Prompt' if using Windows XP. Right-click and select 'Run as administrator' if using Windows Vista or 7.
3. Type 'netsh firewall set opmode disable' and press 'Enter.'
4. Type 'regsvr32 ipnathlp.dll' and press 'Enter.'
5. Type 'netsh firewall reset' and press 'Enter.'
6. Type 'netsh firewall set opmode enable' and press 'Enter.'
7. Type 'Exit' and press 'Enter.' The command prompt closes and Windows Firewall is enabled.