I have 2 computers... one is using windows 7, the other is on windows xp. I want to share a folder, but the share button is greyed out, so I have to use advanced sharing. I click on advanced sharing and check the box that says "share this folder" and click ok. Then I go to my XP machine, go to map network drive and point it to the folder, but when I try to access it, it says "Z:\ is not accessable. Access denied." Uhh... how do I fix this so I can use my shared folder?