What you should have done 1st was go to Compaq website and downloaded all the newest drivers for your rig and burn them to a CD..Chipsets/DX etc all the drivers that you need..
Thats where you can find the correct drivers for your system.
I would remove all the PCI cards except the Video .Get your OS installed and Updated and stable then add each PCI card 1 at a time untill done .Lot less headache .
Thermaltake Armor A90
Corsair HX1000W PS
i7 2600k / Cooler Master Hyper N 520
Asus P8Z68-V Pro / Gen 3
8 GIG Corsair Vengeance
eVGA GTX 570
SB Audigy2 Platinum
Kingston Hyper X120 SSD
WIN 7 - 64b
LG Blue Ray Super Multi Burrner
Logitech THX Z560
3x120mm - 1x200 mm case fans