PCI and USB didn't work in Windows 95 OSR 2.1, i installed it and it works perfectly.
This is from a readme file:"This is the driver for Windows95/OSR2 to support new Intel PCI devices such
as the PCI IDE hard disk controller, PCI USB device etc. It can remove the
yellow question mark in the Device Manager of Windows95. Its readme file is
For installation, copy the file PIIX4.EXE to any temporary directory,
launch it for self-unpacking."
I got original installation CD and it's the same for all QDI motherboards made to 1998. So if anyone needs anything from it, send me an email.