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xalx67 ha scritto:Al limite posso creare un punto di ripristino e poi andarle ad eliminare
HKEY_LOCAL_MACHINE\SAM contains security information and user permissions and passwords. SAM stands for the Security Access Manager. It is an alias of HKEY_LOCAL_MACHINE\Security\SAM. The best way to make changes to the contents of these keys is to use the Microsoft Management Console within Windows XP. Launch this by choosing Start, right clicking My computer and selecting Manage. Highlight Local Users and Groups and you can edit each user here. Changes made directly to the registry often result in problems with permissions and passwords.
Information about the HKEY_LOCAL_MACHINE\SAM Key
This subtree contains the user and group accounts in the SAM database for the local computer. For a computer that is running NT 4, this subtree also contains security information for the domain. The information contained within the SAM registry key is what appears in the user interface of the User Manager utility, as well as in the lists of users and groups that appear when you make use of the Security menu commands in NT4 explorer.
The SAM key contains information used by the Security Accounts Manager. On machines other than domain controllers this key is used to store local user and group information such as usernames, passwords and other such properties. Various data within this key is both protected and encrypted preventing tools or software from reading information such as passwords.
Although domain controllers don't have local accounts and therefore don't directly use this key it is still used however to store user and group information pertaining to the Directory Service Restore Mode feature within Windows.
During boot time, SAM is loaded below the HKEY_LOCAL_MACHINE placeholder from the file %SYSTEMROOT% \ SYSTEM32 \ CONFIG \ SAM
Typically the HKEY_LOCAL_MACHINE \ SAM key is inaccessible as by default and even an Administrator doesn't have access to browse it. It is however possible to use various tools to either elavate the priviliges of the registry editor to system (such as PSEXEC from Microsoft) or modify the permissions of the key itself granting administrators access. Neither of these are recommended however as modifying data below HKEY_LOCAL_MACHINE \ SAM can prevent you from being able to login and may require a complete system restore.
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