installing error's ! There are lots lets share them all!

Okay ... let's try running the subinacl from a different user account. (It looks like something has gone wrong in general with the privileges for your normal (Gavin) user account.) If we run it from the new user account, we might have better luck trying to fix the Gavin account permissions.

From the Start menu, choose Control Panel.
Open Add or remove user accounts (If using the Classic View in Windows Vista, open User Accounts. Then open Manage another account).
Select Create a new account and follow the instructions to complete the account setup process. Give the new user account full administrative rights.
Once the new account is created, choose Log Off from the Start menu. Log into the newly created user account. (Don't use fast user switching to move between accounts.)

Any better luck with running subinacl from inside there?

🙂 Woohoo! Excellent news, Gavin. Glad you're up and running again.