Computer Name:
Workgroup:

When setting up a network using windows wizard the two mentioned things are crucial for the network to see each other. Do NOT name both computers the same name but give both computers the same workgroup.
*edit*
After you finish the wizard it will ask for you to finishing using cd, or someother stuff just pick the last option, it says something like "just finish without cd"

Then follow what riffraff said: But if you don't want to share your whole C drive just go to a folder in C and just right click and go to shareing and share the folder.