I have a simple Linksys router wired network with an XP Home and XP Pro computer on the network in my home. Added a Laptop Vista Home Premium to the network. It sees all and I can access all and everything on the XP's from the Laptop. On each XP I can see the Laptop workgroup and C: and Public available for mapping. When I map to the C:, I get the "No access allowed." I have shared the C:, under security have shared the C:. On Microsoft site I found something about permissions, and have given permission to everything, and still I can get no access to C:. In fact, to test this I decided to share the CD drive, and gave the same configuration to it as I have the C: drive, and I have access to it. There is only one account on the Laptop, password protected, and on the XP there is only one account, password protected. New to this forum & Vista, so if there is some info I can provide you about what I have done, please ask. Some place, I do not remember where, I saw the idea that sharing the root directory on vista is very difficult. Thanks.