Sort of a networking problem

I have a small network with 5 computers. They are networked and access the internet through a Netgear router. Yesterday, one of the computers a laptop, was not able to access files on any of the other computers BUT it can access the internet. I have not been able to fix it. Does anyone here have an idea of what the problem might be and how I can fix it?

TIA
Holly

 

May be this can Help, http://www.ezlan.net/sharing.html

 

Thanks. I got it, it was the darn Norton firewall.


Holly