Here is some text on "Letasoft Sound Booster 11.10.5.14 Portable":
Quick setup (portable)
Letasoft Sound Booster version 1.11.0.514 a specialized volume-enhancing utility for Windows that allows users to amplify audio output by up to beyond the operating system's standard 100% limit
The real keyword here is A portable application does not require installation into the Windows Registry or Program Files folder. Instead, it runs directly from a USB drive, external HDD, or a local folder.
