Re: HD5770 not folding

From the second link bollix47 provided, the Catalyst driver needs to be installed first, then followed by installing the AMD APP SDK. That was for an older installer, I would check with AMD's site to see if that is still the required order.
bollix47 has already given a link to a topic where a HD6870 was able to get folding. The error messages on failure before installing the Intel OpenCL SDK are similar to the ones you are seeing with your HD5770.
bollix47 has already given a link to a topic where a HD6870 was able to get folding. The error messages on failure before installing the Intel OpenCL SDK are similar to the ones you are seeing with your HD5770.