Hello,

This is part of Windows Vista's system file protection - By default, not
even administrators have write access to protected system files.

The TrustedInstaller is NOT a group; it is actually a service (the
TrustedInstaller service), which handles service pack updates.

However, fear not, you are STILL an administrator, and CAN access the files
.... you just have to go thru some extra steps.

* Windows Business or Ultimate editions

In the security tab of the properties screen:

- click Advanced
- Click Owner tab
- Click Edit button
- Click Administrators in the list
- Click OK
- Keep clicking OK until you close out of all of the properties screens

Now, go back into the file properties and you can edit the permissions
however you like

* Windows Home Editions

- Click start
- Type: cmd
- Right-click cmd and click Run As Administrator
- cd to the folder that contains the file you wish to have access to
- Type these commands into the command prompt, where FILE is the filename
that you wish to be able to modify:

takeown /F FILE /A
icacls FILE /grant AdministratorsF)


--
- JB
Microsoft MVP - Windows Shell/User

Windows Vista Support Faq
http://www.jimmah.com/vista/