To assign special access to a registry key
Open Registry Editor
Click the key to which you want to assign special access.
On the Edit menu, click Permissions.
Click Advanced, and then double-click the user or group to whom you want to assign special access.
Under Permissions, select the Allow or Deny check box for each permission you want to allow or deny.
Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on your computer.
To open Registry Editor, click Start, click Run, type , and then click OK.
Assigning special access is useful for situations in which you need to assign permissions that are not defined by either Read or Full Control.
If you are assigning permissions to a subkey and you want the inheritable permissions assigned to the parent key to apply to the subkey also, select the Inherit from parents the permission entries that apply to child objects. Include these with entries explicitly defined here check box.
If you are assigning permissions to a parent key and want any existing permissions of its subkeys replaced with the parent key's inheritable permissions, select the Replace permission entries on all child objects with entries shown here that apply to child objects check box.