An example of the error message would be like this: ERR_EXAMPLE_ERROR, it appears when the computer blue screens, memorise it when it appears and then write it down and post it, will shorten down the possibilities as to why your computer is blue screening.
It will only happen at a random point, when your computer hits a snag and decides to crash, so I would wait for it to happen. When it does, just write it down and post it here, when I can I'll try to diagnose any error you have, and yes, blue screens can mean that you have a hardware issue, it is not just a windows issue.