Quote -  

The other problem with Windows 7 is the folder Document and Settings that has the access forbiden and you even can't know what is inside. All the trash is inside this folder and this folder grows for ever. I don't know how to make this folder have the access open to clean all the trash inside.

 

i too was puzzled about these folders. on asking a couple of code jockeys, they told me that they are nothing but 'placeholders' that redirect queries etc to the new folder setup in W7. access is totally locked because nothing is actually inside them except a little bit of OS coding. my thoughts are that they are needed for older legacy bits of the OS to work properly.