Windows Server 2016 GPO File System Security: Restricting Write Access to Root of Drive C:\. By default domain, users have rights to write in the root of Drive C:\, with this GPO we remove this ability.
1. Start Group Policy Management console;
2. Choose the GPO object, Right Mouse Button click, and click Edit;
3. Navigate to Computer Configuration\Policies\Windows Settings\Security Settings;
4. Right Mouse Button click on File System and click Add File;
5. Select Local Disk (C:) and click OK;
6. In the Database Security window, set the permissions you want, then click OK;
7. In the Add Object window, select the ACL inheritance you want, then click OK;
8. The Group Policy Editor displays the new object name;