I'm happy to here you got it working marked one. Iv seen that error (0xc00000a5) quite a few times before. I am sure it has nothing to do with C2. A lot of people were getting it when windows 7 first came out, and every once in a while when you are installing, and uninstalling a lot of programs like C2. and others it can mess up your registry a little. But Iv always had luck fixing it with one of those to fixes I mentioned before, or a combination of both.