I have 3 PC’s networked through a router. All able to access the Internet. Both PC2 and PC3 can see PC1 in Windows Explorer and files can be moved between all three. PC 1 cannot see the other two in Windows Explorer but by using Windows Search Companion and look for computers, PC 1 can see the other two and I have subsequently therefore created short cuts on the desktop of PC1 to access 2 & 3. The question is – Why cannot Windows Explorer see PC2 & PC3?
Couple of suggestions, first of all try posting in the networking forum on this site, rather than in this helproom. You don't mention what op systems you are using XP or Vista. I have just successfully set up my home network with 3 PCs so can fully understand the frustrations you are having, my home network has 2 Xp machines(1 laptop, 1 PC) and 1 Vista PC, all connecting to the internet via a router and all are able to see each other and print on the same printer which is connected to the Vista Pc . If you are using different op systems make sure they are all using the same workgroup name (Vista uses WORKGROUP whilst XP uses MSHOME)
Make sure that the drives/folders on the relevant machines are set to be shared (Vista is a bit trickier than XP to share and it took me a while to get it all running correctly).
Hope this helps you get it sorted, took me a couple of days (and many restarts!) to finally get everything right, but now it all works well. RG