I have been searching these boards for some time, as well as the rest of the interwebs. And I would like to know if there is a way to GPU mine on a PC before a user is logged in. From what I can tell, graphical drivers are not accessible by programs until a user is logged in. I have a group of computers that sit idle and can remotely run programs on said machines but I am not able to log these machines into any account or boot to another OS. They are running Win 7 x64.
I have tried several different miners. But the only one i have been able to get working is ufasoft's CPU miner. I get OpenCL errors for most of the other miners.