Using the Toad for Oracle MSI installation file gives:
"Error 1925. You do not have sufficient privileges to complete this installation for all users of the machine. Log on as an Administrator and then retry this installation."
In order to install and run Toad for Oracle, make a connection, and do basic operations, Power User or Administrator is required.
Please consult the Toad for Oracle Installation Guide for additional information on privileges required.
https://support.quest.com/searchdocumentation.aspx?pr=268435520&pv=4294946663