Due to an unidentified problem, Windows cannot display Windows Firewall settings

I answer,Really? Here is fine..”, and then I walk to another room, to know whats wrong. “Funny, workgroup Local Area Network (LAN) is fine, internet OK, but why computer in another room couldnot access interne?”.
Internet connection in my office was share with Internet Connection Sharing (ICS) by Windows XP,so one ofcompoter with two LAN Card, one for input internet cable, the other for output to LAN. The logica, if workgroup connection is fine , internet ok, and computer with two lan card is on, so otomatically all of the computer could access internet

After check here and there,finnally I know the problem, Infact Internet Connection Sharing could shut down was caused by trojan and Windows Firewall at computer with two LANcard could not be access. After I clik was appear message “Due to an unidentified problem, Windows cannot display Windows Firewall settings.”

With the helper Google, I start to surfing, and as usual, finnally I found the ways :

1. Download sharedaccess.reg, (only for Windows XP Service Pack 2 or Service Pack 3), then double clik the file for merge to registry windows.

2. Restart computer.

3. Clik Start –> Run, Do the command
CMD /K NETSH FIREWALL RESET

4. Try to open Windows Firewall, if it didnot work.

5. Clik Start –> Run,Do the command

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

6. Restart computer.