The main PC is Windows 7 Ultimate. The laptop is Windows 7 Home Edition. The main PC is under the house network. The laptop is from a location which is not always under the house network. The laptop can connect wireless to the house network. The main PC can see the laptop under Network.

When the laptop connect wireless to the house network, it obtains a house network IP address. I would like the laptop to have a share of a directory so the main PC can use it. When I go in Share, I can see that the Share button is disabled. So, we have to go in Share Advanced. I heard this is normal in Windows 7 as a default setting. When I go in Share Advanced and share the directory, I can see the directory being shared. However, it has three question marks. So, something is wrong. I do not know why there are question marks on that share directory.

This is probably why I cannot map drive to it from the main PC. When I do, it asks for a username and password. So, what I did was to create an account on the laptop and assigned the privileges to that directory. Then, from the main PC, I thought I could use that account to map drive to it. But, that does not work.

When the main PC tries to connect to the laptop for the map drive, I see the authentication asks for a network account. But, that laptop is not under my network. How to do it?