I have no longer the permission to access Dokuments and Settings, Recovery, System Volume Information allthough i'm member of Administrators. There is no chance to get ownership

You can't access Documents and Settings as it's a Junction Point. Junction points provide a "link" to the Users folder - in order to provide backwards compatibility with older programs that look for the Documents and Settings folder.I can access Recovery on my system without issues.As for the System Volume Information folder, I've been able to add my account to the permissions screen (and got an error when applying the changes) - but the changes were completed and I can view the contents of the directory. I was also able to go into the Owner tab and take ownership.I have disabled UAC on my system.- John