Hello, and thanks for your help. I recently upgraded my computer to Windows 8 (a clean install), and was updating all of my drivers. Everything was going fine until I got to the drivers for my Crossfire 6870/6850 graphics cards. During the installation of the latest (13.1) catalyst drivers, my screen flashes as normal during a driver update, but then freezes on a black screen. On a hard restart I get a BSOD on atikmpag.sys. This issue also occurres with anything past and including the 12.11 drivers. I've come to realize that if crossfire is manually disabled or if a card is unplugged, I can install any driver I like without error. The second I enable crossfire, however, I get a black screen. I'm not overclocking anything. Thanks in advance. 

Specs: 
Windows 8 
AMD Phenom II x6 1075T (stock) 
Crossfire HD6870/6850 
128gb Crucial M4 SSD 
Asus M5A97 

Current drivers: 
Catalyst 12.10 
All other drivers (chipset, SATA etc) all up to date

Well, if you read around here a bit, you'll see that almost everyone with a CF setup has problems with these drivers, so it's not a problem on your end. Also it's not just people who downgraded to Windows 8.

I suggest you try 13.2, and if it also fails to work, just keep 12.10 until a newer release comes, which people report to work properly.

Until then: amd.com/report

CPU: AMD Phenom II X4 810 @ 3250MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 850/1100MHz | Display: Chili Green Vision L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 95 x64 Edition

CPU: Pentium 4 Northwood S478 @ 3200MHz | RAM: 1,5GB DDR 400| MoBo: Gigabyte GA-8S661FXMP-RZ | GPU: Abit Geforce Ti 4200 | Display: Dimarson 19" CRT | PSU: Noname 400W | OS: MS Windows XP Pro, Fedora 18

Yeah I reverted back and reported the error. I'm suprised that AMD would introduce such a common error and not have it fixed several versions later. Anyway thanks for the help.

No problems with 13.1 and CF here with Windows 7.  Perhaps the problem isn't all that common at all.

same here,All working fine.

AMD Phenom II 1100t @4.0Ghz /Asus sabertooth 990fx/2-sapphire 2G 6950 dirt 3 edition cards(shaders unlocked,880/1375)/160G intel ssd/16G G-Skill Ripjaw 1600/2-samsung 24" monitors 1920X1200/Corsair AX1200W psu/W7 pro 64,G19/G7 keyboard&mouse,Cooler master HAF932,corsair H100 water cooler,Zalman ram cooler.Sound Blaster X-Fi Titanium Fatal1ty Champion Series,Logitech Z5500 speakers,Roccat Kave 5.1 headset.