During the installation, once the desired products are check and the Next button is select, the following error appears:
"You do not currently have the required level of privileges to perform an installation or update.
You will need to see your administrator to either gain access or have them install or upgrade your Quest products"
User is logged in as an administrator.
Install Toad and it's components manually through the command line. Refer to the below solution for more information on manual install:
https://support.quest.com/SUPPORT/index?page=solution&id=SOL45574 or refer to the User Guide at https://support.quest.com/SUPPORT/index?page=documentation.