That's really odd because I already have simple file sharing disabled.
I have the same user account name on both computers but different passwords.
But when I do connect remotely, the laptop has instant access without password prompt whereas my desktop requires one to connect to the laptop.
I'm only required to "Connect" once when the system is restarted but as soon as the password is given I don't have to again. I have it system mapped in "My Computer".
This is getting frustrating

I'm going to name the pc's Lap and Desk just to be easier, I'm sure you know which is which.
Right now where I sit is Desk can connect to Lap given a password once at each start up. It has access to everything in the shared folder including the shortcut to "My Documents"
With Lap I don't see a folder for Desk in the network places but in workplace computers, Lap and Desk are listed and from there I can get Desks shared folder. But in desks shared folder I can't open the shortcut to my second drive and the shortcut to "My documents" just brings me to Laps "My Documents".
The weirdest part of it is that in my network places it still shows my roommates shared folder on both Desk and Lap but it doesn't show in Workgrouped computers.
Basically I think I can get my network between my 2 pcs fine again, I'm just trying to keep my stuff safe...but you know that already.
So with this in mind, I think you were onto something about setting permissions, Is that still an option?