It is in the format of a chat log. A man's consciousness was uploaded to a computer to save him. Now in the future, they downloaded his mind into a body, but the man gave permission for scientists to copy his consciousness and talk to it through a computer. The scientist on the computer is excited because he finally found a version of the consciousness that is stable and lasts more than a few seconds before going crazy. Does this short story sound familiar to anyone?
It sounds very similar to "We Are Legion (We Are Bob)", which is a story about a guy who gets cryogenically frozen after death. A few hundred years in the future, he's revived (his consciousness is transferred to computers/machines). The doctors there tell him that this process (putting his consciousness into a machine) is dangerous and that some of the people who this happens to go mad/can't handle it. I believe that one of his 'forms' is blown up and the scientist/doctor uses a back-up and puts that into new machines.
Where it strays from your description is that eventually the protagonist is sent out into the solar system on a quest for worlds that can sustain life.