If you want to have the full control of your computer, you ought to know which devices are installed in your machine. Independent of the installed operating system the PCISniffer displays the PCI header data of all PCI devices on the BUS unaltered. PCISniffer is real freeware without any obligation to buy.
This application is self-booting and runs independently from your installed operation system. The Boot-Setup contained in this package runs under Windows (XP or higher) and creates a bootable USB drive or a bootable CD/DVD with PCISniffer. In addition you will find an ISO file to create a bootable PCISniffer CD/DVD on other operating systems.