I understand this question has been asked many times and I have read the article by "How-to-Geek" still I am having problems win 7 and XP communicating.
I have 2 Laptops running under XP and 2 Laptops running under Win 7, I run the XP under workgroup with Mshome name and these 2 laptops can access files from each other, similar under Homegroup, the Win 7 laptops can see each other.
The XP laptops CANNOT see the laptops under win 7, and vice versa. I read the How-to Geek article a few times , I tried to change the name MShome under XP to Workgroup, even then the win 7 and xp cannot see each other. Even worse the XP laptops cannot access each other.