Before you begin, unlock Bitlocker so that all files/folders are freely accessible.
If you haven't already, you will want to activate the "Built-In Administrator" account that has unrestricted access to all accounts regardless of permissions (Unless you have specifically denied access to this account). I would suggest following these instructions here:
Now, while you are logged in with "Built-In Administrator," you need take ownership of the files/folders in question by following these instructions:
Now that you have taken ownership of the file/folder, you should be able to view the permissions using the security properties tab. Now you can create the proper folder permissions to each file/directory by following instructions here:
Once you have successfully obtained access to all of the files in question, create a backup of all files on a separate HDD.
To answer your last question, administrator tools should automatically populate in the start menu and control panel for any new administrator account. Unless you have deleted or disabled access to the 'all users start menu' folder that contains these shortcuts. The default location for these files is:
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Administrative Tools
Make sure that you can access this folder while logged in as "Built-In Administrator" and set the permissions properly. If the links are missing from this folder, you will need to manually recreate them. Follow this tutorial:
Administrative Tools - Restore Shortcuts by Brink
File and folder permissions can be tricky and should only be changed if you are familiar with how/why to do so. Take the time to read through the tutorials here on sevenforums so you can avoid any future problems. And as always, maintain up-to-date backups of any/all important data.
Happy Travels,
Tim