The scenerio ...
Three desktops pc1, pc2, pc3 all use XP and are linked to the internet, and a local network using a Netgear DG834G router.
pc1 and pc2 are in a workgroup called XXXXXX, and pc3 is in a workgroup called WORKGROUP.

pc1 and pc2 share an external HDD for backups which is attached to pc1, and also share a printer which is attached to pc2.

When I am on pc3 and running Windows Explorer and I click on My Network Places/Entire Network/Microsoft Windows Network I can see the workgroups XXXXXX and WORKGROUP, and also the HDD share on pc1 and printer share on pc2

Apart from using the Netgear router to access the internet, I want pc3 to be completely isolated from the other two pcs. I don't want any user to be able to see pc1 or pc2 from pc3.

Can anyone advise how I can do this.

Thanks,

Rannoch