Dell Optiplex 9020 MT with i7 / 16GB / W7 64bit
Startech 7.1 Channel PCI Digital Surround Sound Card
The PC has onboard Realtech High Definition Audio
I installed the PCI card, disabled Realtech in BIOS, disabled SERR in BIOS, disabled Realtech in Windows, uninstalled Realtech in Windows, uninstalled Realtech drivers in Windows Installed latest drivers for both sound systems and a whole heap of combinations of the foregoing.
Every time I reboot my PC the Realtech device reappears in device manager and as soon as it does the PCI card stops working.
Neither Dell nor StarTech can offer any further advice and I've spent around two and a half hours on the phone to them. Does anyone out there know the answer please?