>I have been unable to see my latop in the network neighborhood. The workgroup name is 'MAROIS' on all PC's. Their are shared drives/folders/devices on the laptop. I can see other PC's on the network fine.
>
>Even on the laptop itself I cannot see the laptop. From within the laptop, when I click on the Entire Network/MS Windows Network/MAROIS node, I get an error "Marois is not accessible. You might not have permission to use this network resource..."
>
>I could understand this error if I was trying to connect to the laptop from some other PC on the network, but I get this message when trying to access it from the laptop itself.
>
>When I go into the router control page, the laptop and all other PC's are listed, so it's connected.
>
>Anyone know how I can fix this?

Make sure NetBIOS over TCP/IP is enabled for the relevant network connection:

Network Connection...Properties...Internet Protocol (TCP/IP)...Properties...Advanced...WINS...Enable NetBIOS over TCP/IP.

Another user reported fixing a similar problem by correcting a registry key:

HKLM\SYSTEM\CurrentControlSet\Services\NetBT\Parameters:

the TransportBindName string value was blank, corrected to "\Device\" (without the quotes) fixed his issue.

You can also try the Winsock and TCP/IP repair options outlined in http://forums.techguy.org/networking/593721-solved-help-clearing-netbt.html

There are also free TCP/IP stack repair utilities available for download e.g. http://www.download.com/XP-TCP-IP-Repair/3000-2094_4-10410930.html