Network & Sharing Center Snap In fails to load

Hoping someone can help me figure this one out. Control Panel / Network and Sharing Center - get a blank screen with "Page failed to load". Occurs with both domain and local computer users. LAN appears to be working at this time but Wireless is nowhere to be found. Can not control anything network related. Occurs in safe mode as well. Event viewer not logging anything related to this. It would appear that this "snap in" is no longer loaded on the PC. I am stumped… XPS M1330 Vista Business Thanks.

Hoping someone can help me figure this one out.

Control Panel / Network and Sharing Center - get a blank screen with "Page failed to load".

Occurs with both domain and local computer users. LAN appears to be working at this time but Wireless is nowhere to be found. Can not control anything network related.
Occurs in safe mode as well. Event viewer not logging anything related to this. It would appear that this "snap in" is no longer loaded on the PC.

I am stumped…

XPS M1330
Vista Business
Thanks.

What firewall are you running? below was my problem when I lost my sharing ability between computers, it may work for you. Work from the host computer to do the following:

Network Trouble shooting

Fix
start\run\\PC\right click on file need to map\map network drive\choose drive letter\Make sure reconnect at logon is enabled\finish.

Problem was:
Zone Alarm on PC had lost IP range in Trusted Zone allowed to talk to Laptop.
Which is HOME 192.168.1.100 - 192.168.1.199 IP Range TRUSTED. Interent Zone lowered to Medium.

When Updating Zone Alarm be aware this could happen again.

kind regards,