I mined in early 2010 with a cpu miner and just found my keys after forgetting all thease years, no joke need info please
I think in late 2010 the first mining pools emerged. Could it be that you have been contributing your CPU Power to a mining pool and this was your credentials. If that was the case and you never cashed out your Bitcoin I guess you will not be able to access your coins unless you figure out which pool it was and see if the pool still exists