Unkown Device at startup Win 95

I installed a new motherboard and had it
working. But I noticed I didn’t have sound
and my motherboard has built in sound.
So I selected the new device and
restarted windows. Now everytime
windows tries to start it says It found an
unkowndevice and I need to insert a disk
but it doesn’t tell me which device so I
don’t know what disk. And when I try to
cancel it won’t let me and windows won’t
start. I started in safe mode and
deactivated the plug and play but it still
won’t start. Any suggestions?