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If that doesn't work you may need to go to each folder on a machine where you can access the folders and go to properties->Security for each top level folder and select Advanced. There you will see a check box that says "Inherit from parent permission entries that apply to child objects". Include these with entries explicity defined here. You can also check "replace permission entries on all child objects with entries shown here that apply to child objects".
If you are in a real mess then you can uncheck the box "Inherit from parent permission entries that apply to child objects" and select remove. Then check the box again to regain the permissions from the parent.
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Please do not do this (yet, or probably at all). I don't think Al has read your full post.
Given that you have other computers that work fine, and that it worked fine before you upgraded your operating system, the problem you have is not on your server, it's on the client computer that you're seeing the issue on. So please read
this FAQ , and follow the instructions in it to make sure that the user account you log into your Windows 7 PC with actually matches an account on Windows Home Server.
I'm not on the WHS team, I just post a lot. :)