I can feel your pain. I had lots of trouble with Windows too but managed to get it working eventually. Get every single bit of AMD/ATI software erased off the system, reboot copious numbers of times, uninstall display adapter from the control panel, reboot again copiously, then install the full package (10.7). Reboot again ad lib. That's what got my system going. (I still switched to Linux eventually - much easier to configure, plus I can monitor the mining rig remotely, alter it on-the-fly and restart it if I need to).
Thanks, that post really made me motivated. Tomorrow I will give the card a couple of hours.
Linux or Windows? That's the question. I think I will use windows at this rig, because it is my main rig, which I use for work, and I am way mor comfortable in a windows environment. But if I'm building a new rig, dedicated to mining, it will definitely run linux to prevent unnecessary problems.
Thanks again for the post! Btw, what does "ad lib" mean?